12 Days of Christmas
13th
99 Bottles of Beer
9th
brainfuck
9th
Christmas Trees
11th
Diamonds
14th
Divisors
21st
Emirp Numbers
13th
Evil Numbers
36th
Fibonacci
57th
Fizz Buzz
64th
Happy Numbers
16th
Morse Encoder
9th
Niven Numbers
33rd
Odious Numbers
35th
Pangram Grep
18th
Pascal’s Triangle
26th
Pernicious Numbers
30th
Prime Numbers
29th
Rule 110
12th
Sierpiński Triangle
12th
π
67th
τ
45th