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
56th
Fizz Buzz
63rd
Happy Numbers
16th
Morse Encoder
9th
Niven Numbers
32nd
Odious Numbers
33rd
Pangram Grep
16th
Pascal’s Triangle
26th
Pernicious Numbers
28th
Prime Numbers
28th
Rule 110
12th
Sierpiński Triangle
12th
π
63rd
τ
43rd