UnderKoen (he/him) 🇳🇱

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

brainfuck

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

Intersection

Inventory Sequence

ISBN

Jacobi Symbol

Kolakoski Constant

Kolakoski Sequence

Leap Years

Levenshtein Distance

Leyland Numbers

ln 2

Look and Say

Lucky Numbers

Lucky Tickets

Maze

Medal Tally

Morse Decoder

Morse Encoder

Musical Chords

N Queens

Niven Numbers

Niven Numbers (Long)

Number Spiral

Odious Numbers

Odious Numbers (Long)

Ordinal Numbers

Pangram Grep

Pascal’s Triangle

Pernicious Numbers

Pernicious Numbers (Long)

Poker

Prime Numbers

Prime Numbers (Long)

Proximity Grid

QR Decoder

Quine

Recamán

Repeating Decimals

Reverse Polish Notation

Rijndael S-box

Rock-paper-scissors-Spock-lizard

Roman to Arabic

Rule 110

Seven Segment

SI Units

Sierpiński Triangle

Smith Numbers

Spelling Numbers

Star Wars Opening Crawl

Sudoku

Sudoku v2

Ten-pin Bowling

Time Distance

Tongue-twisters

United States

Vampire Numbers

Van Eck Sequence

Zodiac Signs

γ

λ

π

τ

φ

√2

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