The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Van Eck Sequence in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 479th Glinte 796 68 11ms 14 Dec 2023 479th logvp 796 68 42ms 10 Jan 2024 479th Bulmenisaurus 796 68 39ms 23 Oct 2024 479th albanian-laundromat 796 68 12ms 30 Jul 2025 479th RaBa21 🇭🇺 796 68 11ms 11 Aug 2025 486th sisyphus-ppcg 🇦🇺 793 39 3ms 20 Jan 2023 487th GolfingSuccess 🇬🇷 793 75 2ms 1 May 2021 487th MeWhenI 🇻🇦 793 75 2ms 15 Mar 2022 489th Shanethegamer 🇺🇸 791 50 913ms 15 Dec 2022 490th nipzu 791 53 53ms 6 Nov 2022 491st primo-ppcg 🇹🇭 791 87 1,271ms 30 Nov 2021 492nd DialFrost 🇸🇬 791 91 378ms 16 Nov 2025 493rd Shanethegamer 🇺🇸 788 52 9ms 24 May 2021 493rd helbling 🇨🇭 788 52 9ms 27 May 2024 493rd DialFrost 🇸🇬 788 52 9ms 16 Nov 2025 496th KatieLG 🇬🇧 788 78 94ms 14 Jan 2023 497th tailorspy 786 100 75ms 29 Oct 2023 498th scpchicken 🇵🇼 784 69 13ms 25 Feb 2023 499th GrayJoKing 🇦🇺 784 101 27ms 28 Jun 2023 500th GolfingSuccess 🇬🇷 784 183 473ms 12 days ago 501st MeWhenI 🇻🇦 783 92 438ms 16 Mar 2022 502nd SirBogman 🇺🇸 782 47 38ms 26 Nov 2021 503rd Shanethegamer 🇺🇸 782 60 74ms 5 Dec 2024 504th h3ra993huskp 🇯🇵 782 99 478ms 18 days ago 505th Shanethegamer 🇺🇸 781 122 262ms 7 Feb 2024 505th sean-niemann 🇺🇸 781 122 244ms 8 Jun 2025 505th CaedenHarper 🇨🇦 781 122 284ms 13 days ago 508th MeWhenI 🇻🇦 780 85 10ms 20 Jul 2023 509th janbehrens 🇩🇪 779 93 319ms 21 Nov 2021 510th sisyphus-ppcg 🇦🇺 778 44 812ms 2 Mar 2022 511th Alessandro-Balconi 🇮🇹 778 57 95ms 9 Jul 2023 512th Shanethegamer 🇺🇸 778 73 19ms 10 Sep 2022 513th emgordon154 778 83 4,246ms 14 Jul 2025 514th antimon2 🇯🇵 774 57 342ms 29 Oct 2022 515th coreynash 773 53 9ms 14 Mar 2024 516th Anonymousellama21 773 70 12ms 15 Jun 2022 516th andre-lameirinhas 🇵🇹 773 70 11ms 27 Aug 2022 516th 051 🇸🇬 773 70 45ms 30 Aug 2022 516th IshanPanpaliya 773 70 11ms 19 Oct 2022 516th ahmetdemirag 🇨🇾 773 70 10ms 12 Jun 2024 516th croc54 773 70 10ms 17 Jan 2025 522nd f-tucker 773 77 2ms 8 Jan 2024 523rd edsrzf 🇳🇿 772 90 42ms 30 Dec 2024 524th ovs-code 🇩🇪 770 61 73ms 23 Sep 2023 525th xnor-gate 769 70 140ms 11 Oct 2022 525th TrueBoxGuy 769 70 1,322ms 24 Jul 2023 527th inventshah 768 74 20ms 11 Sep 2022 528th edsrzf 🇳🇿 767 70 8ms 14 Dec 2024 529th Yewzir 🇧🇪 767 177 2,524ms 14 Nov 2025 530th janbehrens 🇩🇪 766 94 465ms 24 Mar 2022 531st adgh 🇬🇧 765 58 96ms 8 Jan 2025 532nd Shanethegamer 🇺🇸 765 87 116ms 7 Nov 2025 533rd JDiLenarda 🇫🇷 764 90 1,299ms 17 Nov 2023 534th MeWhenI 🇻🇦 763 188 451ms 28 Mar 2025 535th Drew-j-Smith 762 71 42ms 19 Apr 2022 535th commandblockguy 🇺🇸 762 71 16ms 22 Sep 2022 535th knyghty 762 71 10ms 16 Feb 2024 535th firegene 🇮🇪 762 71 41ms 23 Sep 2024 539th SirBogman 🇺🇸 762 80 40ms 8 Dec 2021 540th UnderKoen 🇳🇱 762 107 25ms 5 Dec 2024 541st snoozingnewt 🇨🇦 760 60 706ms 13 Oct 2025 542nd DayDun 🇸🇪 759 54 9ms 24 Jan 2023 542nd CaedenHarper 🇨🇦 759 54 9ms 23 Aug 2025 544th stefangimmillaro 759 85 3,771ms 28 Oct 2024 545th DialFrost 🇸🇬 757 51 2ms 3 days ago 546th janbehrens 🇩🇪 756 48 6ms 7 Jun 2021 547th janbehrens 🇩🇪 756 126 275ms 20 Jun 2021 548th MeWhenI 🇻🇦 754 29 4ms 14 Feb 2025 549th MeWhenI 🇻🇦 753 81 38ms 31 Dec 2023 550th SirBogman 🇺🇸 752 64 646ms 16 Jan 2024 550th AlephSquirrel 752 64 422ms 16 Jan 2024 550th msbranicky 752 64 688ms 16 Jan 2024 553rd mauro-1 🇮🇹 752 72 17ms 18 Aug 2021 553rd PiterAnnema 752 72 37ms 23 Mar 2022 553rd Andrey135296 752 72 11ms 4 Apr 2022 553rd TaserTheFox 🇺🇸 752 72 11ms 27 Jan 2023 553rd Fracture17 752 72 41ms 13 Apr 2023 553rd WillConker 752 72 48ms 10 Mar 2024 553rd jipsong 🇩🇪 752 72 18ms 10 Jun 2024 553rd CutSandstone 752 72 35ms 5 Jul 2024 First Prev 481–560 of 1,804 Next Last