12 Days of Christmas
20th
99 Bottles of Beer
14th
Abundant Numbers
16th
brainfuck
9th
Christmas Trees
21st
Diamonds
11th
Divisors
5th
Emirp Numbers
12th
Evil Numbers
34th
Fibonacci
69th
Fizz Buzz
93rd
Leap Years
40th
Niven Numbers
35th
Odious Numbers
32nd
Ordinal Numbers
13th
Pangram Grep
28th
Pascal’s Triangle
17th
Pernicious Numbers
32nd
Prime Numbers
11th
Quine
8th
United States
9th