The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. Why not try and solve them ahead of time?
Recamán in Python 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 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 Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 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 ArkScript 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 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 Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 318th sbyrne51 685 89 10ms 2 Oct 2022 318th eiburns 685 89 11ms 26 Jan 2023 318th Vaekor 685 89 10ms 9 Jul 2023 318th alfonsoalves 685 89 10ms 29 Feb 2024 318th resoNathan 685 89 17ms 10 May 2024 318th robin-scragg 685 89 16ms 16 Jun 2025 318th benvreeves 685 89 10ms 31 Jul 2025 328th hymanimy 678 90 10ms 11 Aug 2021 328th BrenSchaap 678 90 17ms 20 Oct 2021 328th mokymok 🇺🇸 678 90 10ms 29 Nov 2021 328th midnattssol 🇸🇪 678 90 9ms 19 May 2022 328th TheCod-r 🇦🇶 678 90 10ms 28 Sep 2022 328th brochmann 🇸🇪 678 90 30ms 25 Oct 2023 328th jatloe 678 90 17ms 24 Aug 2024 335th boxjelly 670 91 11ms 10 Jan 2021 335th jhpaques 🇫🇷 670 91 10ms 28 Jul 2022 335th Marco-perce 670 91 16ms 22 Aug 2022 335th dgambit 670 91 10ms 26 Sep 2022 339th forlack 663 92 10ms 10 Nov 2021 339th lemogne 663 92 10ms 16 Nov 2021 339th tenthmascot 663 92 10ms 25 Nov 2021 339th deluca-4139 663 92 10ms 15 Dec 2021 339th atazzam 🇺🇸 663 92 33ms 1 Apr 2022 339th zoemarschner 663 92 10ms 16 May 2022 339th nmgetahun 663 92 10ms 5 Dec 2022 339th bobbysq 663 92 10ms 13 Feb 2023 339th PrathamMehta08 663 92 18ms 6 Dec 2023 348th hellwue 656 93 10ms 25 Feb 2022 348th TheSmilingTurtle 656 93 9ms 14 May 2022 348th SniperSmiley 🇺🇸 656 93 10ms 3 Jul 2022 348th james-downey 656 93 10ms 10 Jul 2022 348th dillon-duncando 656 93 18ms 3 Oct 2022 353rd Feriixu 649 94 11ms 9 Feb 2022 353rd Starwort 🇬🇧 649 94 16ms 11 Nov 2022 355th austinrwarner 642 95 17ms 28 Dec 2020 355th ArmaanAS 642 95 10ms 4 Apr 2021 355th namcartoon06 642 95 15ms 15 Jul 2023 355th qwjhvbxi 642 95 10ms 9 Feb 2024 359th cbondurant 635 96 10ms 1 Oct 2021 359th PhysicDev 🇫🇷 635 96 16ms 16 Mar 2022 359th 0dyse 635 96 10ms 15 Apr 2025 362nd mothcolada 🇺🇸 629 97 18ms 2 Mar 2021 362nd RustemB 🇷🇺 629 97 18ms 10 Apr 2021 362nd mhenion8293 🇺🇸 629 97 10ms 18 Jan 2022 362nd eshilo-draper 629 97 17ms 8 Oct 2022 362nd StHagel 629 97 16ms 13 Jul 2023 362nd Ythaenagor 629 97 17ms 5 Aug 2024 362nd itljan30 629 97 16ms 30 Jan 2025 362nd croc54 629 97 17ms 30 Jan 2025 370th Alex-x90 🇺🇸 622 98 30ms 27 Dec 2022 371st Pandapip1 616 99 9ms 10 Feb 2021 371st Andre3582 616 99 10ms 12 Apr 2021 371st kevdah 616 99 11ms 5 Oct 2022 371st Just4FunCoder 616 99 10ms 27 Oct 2022 371st voidgloom 616 99 20ms 23 Oct 2024 371st TheAtrossian 616 99 11ms 5 Jan 2025 377th andrewgopher 610 100 10ms 29 Jul 2021 377th bwat2 610 100 10ms 19 Oct 2021 377th a-penton 610 100 10ms 22 Sep 2022 377th jameswmccarty 610 100 17ms 22 Feb 2025 381st Bananapants22 598 102 11ms 4 Sep 2022 381st FusionAtom360 598 102 10ms 28 Sep 2024 383rd achow0 592 103 11ms 3 Feb 2021 383rd Pena86 592 103 10ms 19 Feb 2021 383rd twocatsinatrenchcoat 592 103 9ms 11 May 2022 386th hacker19374 587 104 10ms 7 Mar 2023 386th adriweb 🇫🇷 587 104 10ms 22 Aug 2023 386th tobeannouncd 587 104 18ms 19 Sep 2023 389th ramsay 581 105 10ms 14 Aug 2022 389th Azearia 581 105 17ms 23 Oct 2023 391st henrytranter 575 106 17ms 8 Mar 2021 391st janga1 575 106 17ms 26 Aug 2021 391st TralfamadorianComedian 575 106 10ms 31 Dec 2024 391st Voltrifrodec 🇸🇰 575 106 16ms 6 Nov 2025 395th za3k 570 107 9ms 8 Oct 2022 395th cthierfelder 🇲🇨 570 107 10ms 9 Sep 2025 397th stefanarridge 565 108 10ms 29 Mar 2022 397th Aquateraneal 🇺🇸 565 108 12ms 19 Feb 2026 399th kenny14231 560 109 17ms 17 Aug 2022 399th SURAJMITTAL 560 109 10ms 19 Dec 2024 First Prev 321–400 of 437 Next Last