12 Days of Christmas
21st
99 Bottles of Beer
14th
Abundant Numbers
19th
brainfuck
11th
Christmas Trees
23rd
Diamonds
13th
Divisors
6th
Emirp Numbers
13th
Evil Numbers
34th
Fibonacci
75th
Fizz Buzz
96th
Leap Years
43rd
Niven Numbers
37th
Odious Numbers
33rd
Ordinal Numbers
14th
Pangram Grep
31st
Pascal’s Triangle
20th
Pernicious Numbers
36th
Prime Numbers
14th
Quine
8th
United States
10th