12 Days of Christmas
18th
99 Bottles of Beer
13th
Abundant Numbers
15th
brainfuck
8th
Christmas Trees
18th
Diamonds
10th
Divisors
2nd
Emirp Numbers
10th
Evil Numbers
30th
Fibonacci
61st
Fizz Buzz
91st
Leap Years
38th
Niven Numbers
29th
Odious Numbers
29th
Ordinal Numbers
11th
Pangram Grep
24th
Pascalβs Triangle
16th
Pernicious Numbers
28th
Prime Numbers
9th
Quine
8th
United States
9th