The Calendar hole will go live in approximately 6 days. Why not try and solve it ahead of time?
Van Eck Sequence in all languages in chars. 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 Chars Time Submitted 158th duckyluuk 🇳🇱 908 53 339ms 28 Aug 2024 158th emgordon154 908 53 364ms 6 May 2025 158th CornerMercury 🇬🇧 908 53 409ms 6 days ago 164th primo-ppcg 🇹🇭 907 40 6ms 1 May 2021 165th nwellnhof 🇩🇪 906 80 323ms 27 Sep 2022 166th DialFrost 🇸🇬 905 49 116ms 2 Jul 2025 166th ovs-code 🇩🇪 905 49 98ms 16 days ago 168th primo-ppcg 🇹🇭 904 43 455ms 26 May 2021 169th Steffan153 🇫🇮 903 36 124ms 18 Jul 2024 170th GrayJoKing 🇦🇺 903 52 62ms 15 days ago 171st lynn 903 54 17ms 17 Nov 2021 171st GrayJoKing 🇦🇺 903 54 18ms 19 Nov 2021 171st btnlq 903 54 18ms 23 Nov 2021 171st annaproxy 903 54 18ms 22 Nov 2022 171st IanUtley 903 54 18ms 22 Nov 2022 176th Lydxn 🇨🇦 902 58 133ms 21 Sep 2022 177th JayXon 🇺🇸 902 63 2ms 14 Sep 2022 177th GrayJoKing 🇦🇺 902 63 2ms 14 Sep 2022 177th btnlq 902 63 2ms 14 Sep 2022 177th Lydxn 🇨🇦 902 63 2ms 27 Jun 2023 177th sean-niemann 🇺🇸 902 63 2ms 1 Jan 2025 182nd xsot 🇸🇬 902 65 2ms 27 Apr 2024 182nd KasperKivimaeki 🇫🇮 902 65 2ms 2 Jan 2025 184th primo-ppcg 🇹🇭 900 51 214ms 12 Feb 2022 185th xnor-gate 899 57 10ms 1 May 2021 185th ovs-code 🇩🇪 899 57 13ms 8 Jul 2021 185th TFeld00 🇩🇰 899 57 22ms 20 May 2022 185th bricknellj 899 57 11ms 10 Aug 2022 185th SirBogman 🇺🇸 899 57 30ms 20 Nov 2022 185th stefangimmillaro 899 57 11ms 7 May 2023 185th SB-945 899 57 11ms 2 Mar 2024 185th bizy-coder 899 57 10ms 16 Aug 2024 185th plcc0 899 57 45ms 6 Mar 2025 194th Lydxn 🇨🇦 899 60 101ms 25 Jun 2023 194th JayXon 🇺🇸 899 60 102ms 25 Jun 2023 196th stefangimmillaro 899 105 304ms 14 Jun 2023 196th nwellnhof 🇩🇪 899 105 271ms 14 Jun 2023 196th JayXon 🇺🇸 899 105 302ms 14 Jun 2023 196th Lydxn 🇨🇦 899 105 279ms 14 Jun 2023 200th saito-ta 🇯🇵 898 40 7ms 21 Jul 2022 201st JayXon 🇺🇸 898 59 109ms 7 Jun 2021 202nd zacjl 898 68 20ms 20 Jan 2025 203rd ovs-code 🇩🇪 898 87 120ms 22 Apr 2025 204th OhmNomNom 897 41 40ms 18 Oct 2022 205th sean-niemann 🇺🇸 897 55 2ms 19 Nov 2025 205th JayXon 🇺🇸 897 55 3ms 19 Nov 2025 207th Steffan153 🇫🇮 895 41 127ms 4 Aug 2024 207th sean-niemann 🇺🇸 895 41 127ms 4 Aug 2024 209th kg583 🇺🇸 895 60 26ms 2 Aug 2025 210th DialFrost 🇸🇬 894 51 695ms 5 Sep 2025 210th sean-niemann 🇺🇸 894 51 710ms 15 Sep 2025 210th xsot 🇸🇬 894 51 711ms 22 Nov 2025 213th sean-niemann 🇺🇸 893 88 60ms 2 Jan 2025 214th NewDefectus 🇮🇱 891 46 9ms 4 May 2021 214th janlelis 891 46 9ms 5 May 2021 214th Irratix 🇳🇱 891 46 9ms 12 May 2021 214th akshatj27 🇦🇶 891 46 9ms 11 Jan 2022 214th lukegustafson 🇺🇸 891 46 10ms 12 Jan 2024 219th GolfingSuccess 🇬🇷 891 54 395ms 15 Jan 2024 219th Shanethegamer 🇺🇸 891 54 550ms 16 Jan 2024 219th lynn 891 54 403ms 17 Feb 2024 219th snoozingnewt 🇨🇦 891 54 460ms 13 Oct 2025 219th Babafaba 891 54 384ms 22 Oct 2025 224th kg583 🇺🇸 891 57 14ms 9 days ago 225th GrayJoKing 🇦🇺 891 67 5ms 12 Feb 2023 226th Steffan153 🇫🇮 890 41 93ms 16 Aug 2024 226th ovs-code 🇩🇪 890 41 31ms 21 Aug 2024 228th GrayJoKing 🇦🇺 890 62 83ms 9 Jun 2022 229th JayXon 🇺🇸 890 69 83ms 23 Feb 2023 229th MeWhenI 🇻🇦 890 69 87ms 4 Mar 2025 231st GrayJoKing 🇦🇺 890 70 43ms 28 Jun 2022 231st primo-ppcg 🇹🇭 890 70 40ms 4 Jul 2022 231st 386asm 🇺🇸 890 70 40ms 6 May 2023 234th nwellnhof 🇩🇪 890 86 483ms 25 Sep 2025 234th KasperKivimaeki 🇫🇮 890 86 323ms 12 days ago 236th Shanethegamer 🇺🇸 889 18 44ms 23 Jul 2022 236th sisyphus-ppcg 🇦🇺 889 18 50ms 24 Jul 2022 236th MeWhenI 🇻🇦 889 18 44ms 25 Jul 2022 236th GolfingSuccess 🇬🇷 889 18 44ms 10 Aug 2022 236th SirBogman 🇺🇸 889 18 76ms 11 Sep 2022 First Prev 161–240 of 1,787 Next Last