The Calendar hole will go live in approximately 28 hours. 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 881st snoozingnewt 🇨🇦 594 105 41ms 13 Oct 2025 882nd Shanethegamer 🇺🇸 594 117 145ms 12 Sep 2024 883rd aksyristos 592 75 101ms 28 Dec 2022 884th emgordon154 591 86 27ms 28 Dec 2024 885th pandapawskat 589 101 3ms 26 Aug 2021 885th User2654 589 101 2ms 12 Mar 2023 887th MathieuIko 588 92 41ms 21 Feb 2022 887th SniperSmiley 🇺🇸 588 92 16ms 21 Jun 2022 887th Vaekor 588 92 15ms 28 Jul 2023 887th eiburns 588 92 13ms 27 Oct 2023 891st JGDoerrer 587 134 402ms 3 Jan 2022 892nd c0d3-4-F00d 🇩🇪 585 70 21ms 27 May 2021 893rd Andrey135296 584 124 330ms 3 Jan 2022 893rd snoozingnewt 🇨🇦 584 124 377ms 13 Oct 2025 895th msbranicky 584 163 260ms 16 Sep 2023 896th KenanSi 583 35 3ms 22 Feb 2022 897th c0d3-4-F00d 🇩🇪 583 102 2ms 5 Dec 2021 898th Yewzir 🇧🇪 582 91 97ms 27 Mar 2024 899th jtaxen 582 93 23ms 5 Apr 2024 899th PyryL 🇫🇮 582 93 16ms 23 Aug 2024 899th Andrey2001 582 93 45ms 21 days ago 902nd prplz 🇦🇺 582 133 385ms 11 May 2021 903rd bac0id 582 135 60ms 23 Feb 2024 904th MarcMush 🇫🇷 581 76 890ms 11 Jul 2021 905th Ripick 581 90 129ms 19 Aug 2025 906th j-Ewan 581 164 293ms 23 Mar 2022 907th Re-Adventures 🇮🇳 579 135 149ms 5 Jan 2023 908th warmCabin 578 103 2ms 7 Nov 2023 909th janbehrens 🇩🇪 578 134 409ms 21 Nov 2022 910th targrik 577 71 10ms 29 Jul 2025 911th Shanethegamer 🇺🇸 577 145 25ms 13 Jul 2021 912th akshatj27 🇦🇶 577 165 275ms 11 Jan 2022 912th 0xjac 🇨🇭 577 165 292ms 9 Jun 2025 914th j-Ewan 576 94 22ms 1 Mar 2022 914th CatsAreFluffy 576 94 25ms 8 Feb 2023 914th AbhilashaTandon 576 94 11ms 28 Feb 2023 914th briankuder 576 94 12ms 31 May 2023 918th TheZwierzLF 🇵🇱 575 64 38ms 12 days ago 919th snoozingnewt 🇨🇦 574 99 2ms 13 Oct 2025 920th MeWhenI 🇻🇦 573 54 3ms 16 Apr 2023 921st Shanethegamer 🇺🇸 573 77 392ms 2 Sep 2021 922nd Mabeloid 🇳🇴 573 84 482ms 6 Oct 2024 922nd dokutan 573 84 461ms 9 Feb 2025 924th yoshykai 573 135 429ms 31 Mar 2025 925th cbrt-x 572 94 120ms 20 Jan 2025 926th weliveinhell 🇭🇹 572 104 3ms 3 Oct 2023 927th jhonw 570 42 34ms 23 Sep 2023 928th RDShah 570 95 39ms 25 Nov 2021 928th inverseLorentz 🇦🇺 570 95 16ms 10 Jul 2022 928th Ripick 570 95 14ms 30 Dec 2022 928th fynnkroeger 570 95 16ms 6 Jan 2023 928th jmerle 🇳🇱 570 95 66ms 16 Feb 2023 928th brimstonetrader 570 95 16ms 22 Jan 2024 934th wiebecommajonas 570 137 128ms 20 Nov 2021 935th SpareManiKatti 569 72 10ms 10 Sep 2021 935th CatsAreFluffy 569 72 10ms 16 Dec 2022 937th MeWhenI 🇻🇦 568 100 2ms 15 Sep 2022 938th RKlazinga 564 96 16ms 14 Aug 2021 938th Irratix 🇳🇱 564 96 39ms 28 Apr 2022 938th randolchance 564 96 30ms 9 Feb 2023 938th jmmographer 564 96 17ms 11 Nov 2023 942nd btjones0 562 64 11ms 20 May 2021 943rd MeWhenI 🇻🇦 562 79 90ms 12 Dec 2022 944th Shotokhan 562 140 2,495ms 2 Oct 2025 945th snoozingnewt 🇨🇦 562 149 26ms 13 Oct 2025 946th JOrE20 🇺🇸 561 73 10ms 5 Nov 2025 947th Jacob385 561 138 606ms 28 Oct 2025 948th Shanethegamer 🇺🇸 560 82 16ms 8 Sep 2021 949th smartiel 558 97 54ms 19 Sep 2022 949th qwjhvbxi 558 97 14ms 8 Feb 2024 951st cure-honey 🇯🇵 558 110 97ms 11 Jul 2021 952nd trinityy-7 554 74 10ms 6 Feb 2024 953rd roavin 553 131 358ms 23 Jun 2022 954th HumanoidCPU 553 140 425ms 8 Nov 2025 955th scpchicken 🇵🇼 552 56 26ms 17 Dec 2022 956th emgordon154 552 68 129ms 4 Aug 2024 957th ehulinsky 🇺🇸 552 98 47ms 15 Nov 2021 957th 0dyse 552 98 11ms 6 May 2025 957th damoose717 552 98 15ms 23 May 2025 960th Chinay-Domitrix 🇺🇸 552 117 2,723ms 2 Apr 2025 First Prev 881–960 of 1,809 Next Last