12 Days of Christmas
13th8th
99 Bottles of Beer
31st
Abundant Numbers
49th
brainfuck
4th
Christmas Trees
24th
Cubes
18th
Divisors
22nd64th
Emirp Numbers
17th
Emojify
16th
Evil Numbers
24th45th
Fibonacci
117th17th46th
Fizz Buzz
38th111th
Leap Years
25th
Leyland Numbers
9th
Niven Numbers
42nd
Odious Numbers
25th43rd
Pernicious Numbers
55th
Prime Numbers
38th48th
Rule 110
11th
Spelling Numbers
8th
Sudoku
9th
π
58th