12 Days of Christmas
13th10th
99 Bottles of Beer
30th
Abundant Numbers
48th
brainfuck
7th
Christmas Trees
24th
Cubes
18th
Divisors
22nd65th
Emirp Numbers
17th
Emojify
16th
Evil Numbers
26th47th
Fibonacci
122nd17th50th
Fizz Buzz
39th110th
Leap Years
25th
Leyland Numbers
10th
Niven Numbers
45th
Odious Numbers
26th41st
Pernicious Numbers
56th
Prime Numbers
38th50th
Rule 110
11th
Spelling Numbers
9th
Sudoku
8th
π
61st