Kolakoski 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 ><> ALGOL 68 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 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 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 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 799th TaserTheFox 🇺🇸 714 69 38ms 16 Feb 2023 799th Jacob385 714 69 43ms 22 Apr 2024 803rd emgordon154 712 80 2,291ms 9 Aug 2025 804th MeWhenI 🇻🇦 711 90 1,429ms 14 Jun 2023 805th marcin7Cd 710 103 21ms 12 Feb 2021 806th Feniske 🇫🇷 709 51 270ms 21 Nov 2023 807th CaedenHarper 🇨🇦 709 84 435ms 17 Oct 2025 808th aadenboy 🇺🇸 709 86 2ms 16 Dec 2025 809th chordowl 709 92 116ms 17 Mar 2021 810th rucin93 🇵🇱 707 60 136ms 9 Aug 2024 811th omurakazuaki 🇯🇵 706 66 10ms 18 Feb 2021 811th BambooleanLogic 🇸🇪 706 66 9ms 22 Aug 2022 811th coreynash 706 66 10ms 21 Oct 2023 811th two-bad 🇬🇧 706 66 10ms 24 Nov 2023 811th dylanarmstrong 706 66 10ms 15 Jan 2024 811th madeforlosers 706 66 9ms 5 Nov 2025 817th Stockoh 🇫🇷 706 68 427ms 24 Jun 2024 817th JunkIce 706 68 442ms 3 Dec 2024 819th typeswitch-dev 🇵🇹 705 74 8ms 7 Aug 2023 820th antimon2 🇯🇵 704 65 495ms 19 Jan 2021 820th msbranicky 704 65 1,289ms 12 Sep 2023 822nd osmith93 704 70 25ms 14 Jun 2021 822nd ridingqwerty 🇺🇸 704 70 12ms 23 Feb 2024 822nd mbittner20 704 70 11ms 15 Jul 2024 822nd RaBa21 🇭🇺 704 70 12ms 18 Jul 2025 826th Shanethegamer 🇺🇸 704 91 39ms 16 Jun 2022 827th Herbert00709 🇵🇱 704 101 60ms 19 Nov 2024 828th SnowballSH 703 60 36ms 12 Feb 2021 828th aksyristos 703 60 41ms 28 Feb 2023 828th Lv0Sys 🇵🇱 703 60 37ms 4 Dec 2025 831st primo-ppcg 🇹🇭 702 47 1,032ms 5 Feb 2022 832nd MeWhenI 🇻🇦 702 238 12ms 29 Aug 2023 833rd UnderKoen 🇳🇱 700 134 13ms 20 Jan 2025 834th jared-hughes 699 44 6ms 31 Jul 2022 835th NewDefectus 🇮🇱 699 76 2ms 25 Oct 2021 835th JohandeRuiter 🇳🇱 699 76 2ms 3 Dec 2023 837th Shanethegamer 🇺🇸 699 77 13ms 9 Oct 2023 838th targrik 698 123 305ms 10 Jul 2025 839th jared-hughes 698 159 1,670ms 16 Sep 2025 840th AlephSquirrel 696 34 49ms 30 Dec 2022 841st neihousaigaai 696 67 10ms 10 Apr 2021 842nd Jacob385 696 69 436ms 22 Apr 2024 843rd targrik 695 57 5ms 26 Aug 2025 844th SnowballSH 694 71 11ms 12 Feb 2021 844th Andre3582 694 71 11ms 18 Mar 2021 844th PhysicDev 🇫🇷 694 71 10ms 20 May 2021 844th Alban-Boissard 694 71 12ms 10 Jun 2025 848th boxjelly 694 94 114ms 21 Jan 2021 848th YAJUE114514 694 94 133ms 24 Jul 2025 850th Espiobest 692 61 38ms 13 Feb 2021 850th DaCuteRaccoon 692 61 37ms 9 Dec 2022 852nd edsrzf 🇳🇿 692 91 21ms 21 Dec 2024 853rd JGDoerrer 691 103 443ms 5 Jan 2022 853rd tailorspy 691 103 63ms 29 Oct 2023 855th Shanethegamer 🇺🇸 690 106 17ms 4 Oct 2024 856th msbranicky 689 95 5ms 11 Aug 2023 857th NewDefectus 🇮🇱 688 32 34ms 20 Dec 2021 858th GolfingSuccess 🇬🇷 688 69 33ms 17 Aug 2024 859th Andriamanitra 🇫🇮 687 95 148ms 20 Jul 2023 860th KasperKivimaeki 🇫🇮 687 125 299ms 3 Oct 2025 861st msbranicky 685 89 2ms 26 Sep 2023 862nd LeeCamp 684 72 10ms 16 Feb 2022 862nd LukasFolwarczny 🇨🇿 684 72 10ms 16 Sep 2022 862nd CutSandstone 684 72 38ms 8 Jul 2024 865th Shanethegamer 🇺🇸 680 126 24ms 8 Jul 2021 866th dokutan 678 59 3ms 18 Jul 2025 867th Yewzir 🇧🇪 677 88 421ms 14 Oct 2023 868th jared-hughes 676 35 44ms 31 Jul 2022 868th Natanaelel 🇸🇪 676 35 51ms 18 Aug 2022 870th SirBogman 🇺🇸 676 44 214ms 22 Oct 2021 871st richard-oelze 🇩🇪 675 73 30ms 4 Apr 2021 871st mauro-1 🇮🇹 675 73 9ms 18 Aug 2021 871st gchenfc 675 73 9ms 24 Jan 2022 871st hiichbindermax 675 73 11ms 26 Feb 2022 871st Omega65536 🇩🇪 675 73 11ms 24 Nov 2022 871st sandorstormen 675 73 11ms 18 Feb 2023 871st Mr-McChicken 675 73 10ms 15 Oct 2023 871st Masttest 675 73 10ms 21 Feb 2024 879th dokutan 675 99 372ms 24 Sep 2025 880th janbehrens 🇩🇪 673 68 1,239ms 9 Apr 2021 First Prev 801–880 of 1,910 Next Last