The Calendar hole will go live in approximately 2 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 801st Shanethegamer 🇺🇸 631 49 3ms 16 Sep 2021 802nd alemelis 631 70 2,045ms 19 Aug 2024 803rd 4hg 🇺🇸 630 38 130ms 28 Jan 2023 804th florton 630 65 9ms 7 Jan 2022 804th Garklein 🇨🇦 630 65 14ms 7 Jan 2022 804th xyangst 630 65 10ms 12 Oct 2024 807th hymanimy 629 86 49ms 24 Aug 2021 807th FortuiteMan 🇫🇷 629 86 49ms 20 Aug 2023 807th Azearia 629 86 10ms 23 Oct 2023 807th Techdude01 629 86 13ms 21 Dec 2023 807th yuchuehw 629 86 14ms 4 Feb 2024 807th dokutan 629 86 14ms 9 Feb 2025 807th Flekay 🇩🇪 629 86 15ms 11 Jul 2025 807th LostSyntax21 🇬🇧 629 86 16ms 30 Nov 2025 815th Lydxn 🇨🇦 629 123 387ms 2 Feb 2022 816th janbehrens 🇩🇪 627 62 284ms 3 Dec 2023 817th emplv 🇱🇻 627 86 97ms 20 Dec 2022 818th snoozingnewt 🇨🇦 627 103 3,335ms 13 Oct 2025 819th jerrandolph 627 152 300ms 3 Nov 2023 819th JRaspass 🇬🇧 627 152 266ms 7 Feb 2024 821st MeWhenI 🇻🇦 625 110 1,246ms 14 Jun 2023 822nd Adix-null 🇱🇹 625 116 339ms 17 May 2023 823rd Shanethegamer 🇺🇸 622 55 113ms 9 Jan 2022 824th DialFrost 🇸🇬 622 71 610ms 23 Jul 2024 825th MichalMarsalek 🇨🇿 622 87 16ms 3 Dec 2021 825th willschremmer 622 87 22ms 4 Apr 2024 825th jatloe 622 87 39ms 27 Sep 2024 828th olivermrose 🇺🇸 621 66 21ms 26 Sep 2021 828th scpchicken 🇵🇼 621 66 22ms 17 May 2023 830th frankgraziano 620 58 13ms 21 Feb 2023 831st lynn 620 126 159ms 10 Mar 2022 832nd janbehrens 🇩🇪 619 50 3ms 1 May 2021 832nd kurkale6ka 619 50 3ms 14 Jul 2021 834th primo-ppcg 🇹🇭 619 125 410ms 2 Aug 2021 835th varhammer 🇷🇺 617 99 20ms 13 Dec 2023 836th janAkali 🇷🇺 615 85 117ms 17 May 2025 837th befoster 615 88 23ms 8 May 2021 837th mrmena 🇦🇺 615 88 55ms 6 Jul 2021 837th martinnorling 🇸🇪 615 88 17ms 10 Feb 2022 837th abba23 615 88 14ms 27 May 2022 837th bbakersmith 615 88 14ms 28 Jun 2022 837th santiagvalencia 615 88 23ms 6 Mar 2025 843rd MeWhenI 🇻🇦 615 276 14ms 29 Aug 2023 844th Meowsan91 🇨🇿 614 118 317ms 21 Nov 2021 845th Shanethegamer 🇺🇸 613 97 2ms 28 Dec 2022 846th elisherer 🇮🇱 612 67 21ms 7 Oct 2021 847th emgordon154 610 88 18ms 8 Dec 2024 848th albanian-laundromat 610 96 179ms 9 Nov 2025 849th marcin7Cd 610 100 12ms 1 May 2021 850th emgordon154 609 134 20ms 21 Nov 2024 851st bastienvoirin 🇫🇷 608 89 16ms 14 Sep 2021 851st Troon 608 89 50ms 18 Oct 2022 851st PaulMWeiser 608 89 17ms 5 Mar 2023 851st aalec 608 89 23ms 25 Apr 2024 851st ComputerKWasTaken 🇺🇸 608 89 10ms 23 Jan 2025 851st ImpressedByRocks 608 89 59ms 13 Feb 2025 851st smilesformiles3 608 89 54ms 24 Sep 2025 858th GitMensch 607 280 20ms 9 days ago 859th MeWhenI 🇻🇦 606 89 101ms 14 Oct 2022 860th msbranicky 606 224 1,714ms 16 Sep 2025 861st emgordon154 605 110 109ms 24 days ago 862nd Shanethegamer 🇺🇸 605 131 409ms 24 Mar 2023 863rd snoozingnewt 🇨🇦 603 64 1ms 13 Oct 2025 864th neel11235813 603 68 21ms 4 Apr 2023 864th madeforlosers 603 68 25ms 16 Oct 2023 866th AkashTandon167 601 90 14ms 1 Nov 2021 866th jfallon1997 601 90 74ms 9 Aug 2022 866th myleopard 601 90 18ms 22 Dec 2022 866th thienudomsrirungruang 601 90 15ms 14 Nov 2024 866th JunkIce 601 90 24ms 3 Dec 2024 871st CaedenHarper 🇨🇦 600 129 451ms 5 Oct 2025 872nd HumanoidCPU 599 159 311ms 6 days ago 873rd Hillsoft 598 90 128ms 27 Jul 2022 874th MaxElf999 595 91 21ms 27 Sep 2022 874th aaardwark 595 91 17ms 2 Jun 2025 874th YAJUE114514 595 91 17ms 3 Jul 2025 874th osNiko 🇧🇷 595 91 17ms 22 Aug 2025 878th Jonatan6 🇩🇰 595 100 2ms 27 Apr 2024 878th Herbert00709 🇵🇱 595 100 2ms 1 Nov 2024 880th Shanethegamer 🇺🇸 594 117 145ms 12 Sep 2024 First Prev 801–880 of 1,808 Next Last