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 321st RockOfStone 866 56 2ms 5 Nov 2021 322nd KasperKivimaeki 🇫🇮 866 110 272ms 29 Sep 2025 323rd sean-niemann 🇺🇸 865 71 87ms 30 Dec 2024 324th bitsandbeyond 🇳🇱 864 45 663ms 5 Nov 2025 325th DialFrost 🇸🇬 864 77 108ms 18 days ago 325th snoozingnewt 🇨🇦 864 77 131ms 18 days ago 327th primo-ppcg 🇹🇭 863 84 317ms 21 Nov 2021 328th Shanethegamer 🇺🇸 862 68 86ms 27 May 2022 329th GolfingSuccess 🇬🇷 860 56 425ms 15 Jan 2024 329th b-illy 🇬🇧 860 56 363ms 7 Sep 2024 329th CornerMercury 🇬🇧 860 56 474ms 25 mins ago 332nd jared-hughes 860 169 8ms 17 Mar 2023 333rd primo-ppcg 🇹🇭 859 36 4ms 1 May 2021 333rd HPWiz 🇳🇿 859 36 4ms 2 May 2021 335th Lydxn 🇨🇦 859 46 1,137ms 27 Jun 2023 336th hiichbindermax 859 63 11ms 17 Feb 2023 336th SB-945 859 63 11ms 2 Mar 2024 336th Emutis 🇱🇹 859 63 11ms 15 Feb 2025 336th solisolu 859 63 28ms 21 days ago 340th zacjl 858 81 47ms 14 Feb 2025 341st MichalMarsalek 🇨🇿 857 61 135ms 15 Nov 2021 341st GrayJoKing 🇦🇺 857 61 136ms 8 May 2022 343rd jared-hughes 855 28 33ms 23 Sep 2021 343rd neel11235813 855 28 34ms 4 Mar 2023 345th m-tkach 🇺🇦 855 92 73ms 2 Jan 2022 345th inventshah 855 92 62ms 16 Dec 2022 345th 09cf 855 92 58ms 9 Sep 2023 345th ovs-code 🇩🇪 855 92 68ms 3 Jun 2024 345th KasperKivimaeki 🇫🇮 855 92 64ms 21 days ago 350th dmrichwa 🇺🇸 854 48 9ms 25 Apr 2022 351st JayXon 🇺🇸 854 159 1,642ms 15 Sep 2025 352nd rucin93 🇵🇱 853 44 125ms 3 Aug 2024 353rd stefangimmillaro 853 72 87ms 7 May 2023 354th clockworknazo 853 74 5ms 22 Nov 2022 355th emplv 🇱🇻 851 112 267ms 19 Feb 2022 356th GrayJoKing 🇦🇺 850 24 3ms 5 Jun 2025 357th m-tkach 🇺🇦 850 70 2ms 20 Dec 2021 357th ovs-code 🇩🇪 850 70 2ms 12 Feb 2023 357th ListeriaM 850 70 2ms 21 Aug 2023 360th MeWhenI 🇻🇦 850 216 928ms 12 Dec 2021 361st Shanethegamer 🇺🇸 849 169 477ms 28 Apr 2025 362nd primo-ppcg 🇹🇭 848 72 18ms 22 Jan 2023 363rd TFeld00 🇩🇰 846 64 22ms 27 May 2021 363rd SirBogman 🇺🇸 846 64 30ms 26 Nov 2021 363rd AlephSquirrel 846 64 38ms 18 Apr 2023 363rd msbranicky 846 64 12ms 25 Jul 2023 363rd plcc0 846 64 45ms 6 Mar 2025 363rd Pyroan 846 64 22ms 13 Mar 2025 363rd BREMAUCY 🇫🇷 846 64 11ms 26 Jul 2025 363rd wobblybits 846 64 15ms 21 Aug 2025 371st Shanethegamer 🇺🇸 845 57 367ms 16 Jan 2024 371st CaedenHarper 🇨🇦 845 57 360ms 10 Sep 2024 371st DialFrost 🇸🇬 845 57 386ms 30 Dec 2024 371st emgordon154 845 57 347ms 6 May 2025 371st snoozingnewt 🇨🇦 845 57 361ms 13 Oct 2025 371st Babafaba 845 57 412ms 22 Oct 2025 377th yeminghan2021 845 93 80ms 3 Feb 2025 378th Steffan153 🇫🇮 843 64 100ms 18 Jul 2024 379th namelessiw 843 86 359ms 16 Aug 2025 379th DialFrost 🇸🇬 843 86 389ms 16 Nov 2025 381st primo-ppcg 🇹🇭 841 47 975ms 1 May 2021 381st pardouin 🇫🇷 841 47 890ms 10 Sep 2025 383rd ovs-code 🇩🇪 841 58 17ms 1 Jul 2024 384th Shanethegamer 🇺🇸 841 73 99ms 13 May 2021 385th stefangimmillaro 841 92 407ms 6 Oct 2025 386th Steffan153 🇫🇮 840 46 2ms 20 Jul 2024 386th sean-niemann 🇺🇸 840 46 2ms 28 Apr 2025 388th ovs-code 🇩🇪 839 171 399ms 9 Mar 2025 389th jared-hughes 838 71 2ms 17 Mar 2022 389th LorenzoDeGaspari 838 71 2ms 26 Jul 2022 389th inventshah 838 71 3ms 24 Nov 2022 392nd prplz 🇦🇺 836 44 37ms 1 May 2021 393rd duckyluuk 🇳🇱 836 49 10ms 3 Oct 2024 394th Shanethegamer 🇺🇸 836 58 2ms 24 May 2021 395th MeWhenI 🇻🇦 836 94 83ms 8 May 2022 395th jared-hughes 836 94 81ms 20 Jul 2022 395th janbehrens 🇩🇪 836 94 68ms 20 Nov 2022 395th MateuszPietrzak 🇵🇱 836 94 78ms 11 Jan 2024 395th luuumine 🇫🇷 836 94 79ms 10 Nov 2025 400th edsrzf 🇳🇿 836 114 263ms 8 Nov 2024 First Prev 321–400 of 1,805 Next Last