12 Days of Christmas
5th99 Bottles of Beer
5thAbundant Numbers
5thArrows
3rdASCII Table
4thCatalan Numbers
3rdChristmas Trees
2ndCollatz
4thDiamonds
2ndDivisors
8thEmirp Numbers
5thEmojify
5thEvil Numbers
7thFibonacci
21stFizz Buzz
69thFoo Fizz Buzz Bar
3rdFractions
2ndHappy Numbers
4thHappy Numbers (Long)
4thHexdump
2ndLeap Years
4thLeyland Numbers
3rdLook and Say
3rdLucky Tickets
2ndNiven Numbers
5thNumber Spiral
3rdOdious Numbers
7thOrdinal Numbers
6thPangram Grep
5thPascal’s Triangle
4thPernicious Numbers
4thPrime Numbers
7thPrime Numbers (Long)
3rdRecamán
4thRule 110
2ndSierpiński Triangle
2ndSmith Numbers
2ndTongue-twisters
5thUnited States
3rdVampire Numbers
4thVan Eck Sequence
2ndZodiac Signs
2ndλ
6thπ
6thτ
5thφ
2nd√2
2nd𝑒
3rd