12 Days of Christmas
6th
99 Bottles of Beer
7th
Abundant Numbers
15th
ASCII Table
9th
brainfuck
9th
Card Number Validation
4th
Catalan’s Constant
9th
Christmas Trees
7th
Collatz
9th
CSS Colors
6th
Cubes
8th
Diamonds
10th
Divisors
5th
Emirp Numbers
9th
Emojify
5th
Evil Numbers
19th
Fibonacci
7th
Fizz Buzz
53rd
Happy Numbers
5th
ISBN
4th
Kolakoski Constant
8th
Leap Years
5th
Levenshtein Distance
Leyland Numbers
7th
Lucky Numbers
Lucky Tickets
Morse Encoder
4th
Niven Numbers
9th
Odious Numbers
18th
Ordinal Numbers
11th
Pangram Grep
6th78th
Pascal’s Triangle
10th
Prime Numbers
11th
Quine
1st26th
Recamán
10th
Rock-paper-scissors-Spock-lizard
9th
Roman to Arabic
7th
ROT13
2nd
Sierpiński Triangle
12th
Smith Numbers
Tongue-twisters
5th
United States
Vampire Numbers
6th
Van Eck Sequence
7th
λ
11th
π
11th
τ
10th
φ
9th
√2
9th
𝑒
13th