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 73rd DialFrost 🇸🇬 933 58 19ms 26 Jul 2024 73rd b-illy 🇬🇧 933 58 14ms 6 Sep 2024 73rd CaedenHarper 🇨🇦 933 58 11ms 10 Sep 2024 73rd KasperKivimaeki 🇫🇮 933 58 11ms 5 Jul 2025 73rd wuduculfre 933 58 11ms 21 Jul 2025 73rd snoozingnewt 🇨🇦 933 58 10ms 13 Oct 2025 73rd Babafaba 933 58 11ms 22 Oct 2025 73rd luuumine 🇫🇷 933 58 11ms 8 Nov 2025 73rd Mukundan314 933 58 12ms 24 days ago 90th JayXon 🇺🇸 931 44 9ms 1 May 2021 90th GrayJoKing 🇦🇺 931 44 9ms 7 Sep 2021 90th nwellnhof 🇩🇪 931 44 9ms 12 Oct 2021 93rd GrayJoKing 🇦🇺 930 39 5ms 2 May 2021 93rd clockworknazo 930 39 5ms 23 Nov 2022 93rd Lydxn 🇨🇦 930 39 5ms 6 Feb 2023 93rd xsot 🇸🇬 930 39 5ms 27 Apr 2024 97th JayXon 🇺🇸 930 64 2ms 1 May 2021 97th HPWiz 🇳🇿 930 64 2ms 1 May 2021 97th nwellnhof 🇩🇪 930 64 2ms 11 Oct 2021 97th Lydxn 🇨🇦 930 64 2ms 29 Jan 2022 97th rhdqor213 930 64 7ms 14 Aug 2023 97th JohandeRuiter 🇳🇱 930 64 2ms 23 Jul 2024 103rd Bubbler-4 927 22 19ms 4 Feb 2022 103rd ngn 🇧🇬 927 22 22ms 5 Feb 2022 103rd kgolf 927 22 21ms 14 Feb 2022 103rd SirBogman 🇺🇸 927 22 20ms 10 Nov 2023 103rd bstrat 927 22 21ms 7 Oct 2025 108th kg583 🇺🇸 926 52 442ms 30 Dec 2024 109th GrayJoKing 🇦🇺 925 37 321ms 2 May 2021 109th nwellnhof 🇩🇪 925 37 552ms 6 Dec 2021 111th nwellnhof 🇩🇪 925 42 533ms 29 Oct 2024 112th dvargas46 🇺🇸 921 39 9ms 19 Jun 2022 113th Frowny 920 26 34ms 1 May 2021 113th Bubbler-4 920 26 34ms 16 Nov 2021 113th Natanaelel 🇸🇪 920 26 34ms 20 Jul 2023 113th stackofbears 920 26 35ms 13 Dec 2023 113th 2bular 920 26 33ms 15 Oct 2025 118th clockworknazo 920 42 2ms 22 Nov 2022 118th xsot 🇸🇬 920 42 2ms 26 Apr 2024 118th canissimia 🇦🇶 920 42 2ms 14 days ago 121st ovs-code 🇩🇪 920 48 834ms 10 May 2024 122nd MeWhenI 🇻🇦 919 40 62ms 4 Nov 2022 122nd xsot 🇸🇬 919 40 35ms 3 May 2025 122nd sisyphus-ppcg 🇦🇺 919 40 35ms 17 days ago 125th JayXon 🇺🇸 919 43 873ms 2 May 2021 125th GrayJoKing 🇦🇺 919 43 1,034ms 2 May 2021 125th stefangimmillaro 919 43 1,030ms 7 May 2023 128th TimHuisman1703 917 59 10ms 7 Jan 2022 128th wuzekai518 917 59 10ms 28 Jun 2024 128th Lv0Sys 🇵🇱 917 59 11ms 13 days ago 131st btnlq 917 79 324ms 16 Apr 2023 131st JayXon 🇺🇸 917 79 317ms 15 Jun 2023 131st Lydxn 🇨🇦 917 79 314ms 27 Jun 2023 134th JayXon 🇺🇸 916 41 131ms 12 Dec 2024 135th Waffle3z 915 53 2ms 1 May 2021 135th JayXon 🇺🇸 915 53 2ms 2 May 2021 135th Lydxn 🇨🇦 915 53 2ms 22 Aug 2021 135th jared-hughes 915 53 2ms 15 Feb 2022 135th FlyingPenguin223 915 53 2ms 7 Dec 2024 135th GrayJoKing 🇦🇺 915 53 2ms 14 Jul 2025 135th sean-niemann 🇺🇸 915 53 2ms 16 Jul 2025 142nd KasperKivimaeki 🇫🇮 915 65 2ms 2 Jan 2025 143rd JayXon 🇺🇸 914 86 63ms 2 Jan 2022 143rd nwellnhof 🇩🇪 914 86 76ms 18 Jan 2022 143rd Lydxn 🇨🇦 914 86 83ms 29 Jan 2022 146th GrayJoKing 🇦🇺 913 40 32ms 16 Aug 2024 146th btnlq 913 40 32ms 21 Aug 2024 146th emgordon154 913 40 127ms 26 Sep 2024 149th lynn 912 59 133ms 1 May 2021 149th HPWiz 🇳🇿 912 59 127ms 1 May 2021 149th Lydxn 🇨🇦 912 59 134ms 1 Jul 2023 149th ovs-code 🇩🇪 912 59 137ms 11 Nov 2023 153rd primo-ppcg 🇹🇭 911 45 9ms 1 May 2021 153rd itsh01 911 45 9ms 11 Jul 2021 153rd ovs-code 🇩🇪 911 45 10ms 17 Nov 2024 153rd xsot 🇸🇬 911 45 10ms 3 May 2025 157th lyphyser 911 46 52ms 1 Feb 2025 158th JayXon 🇺🇸 911 85 670ms 27 Sep 2025 159th JayXon 🇺🇸 909 86 124ms 14 Jan 2022 159th acotis 909 86 119ms 18 Oct 2025 First Prev 81–160 of 1,805 Next Last