12 Days of Christmas
41st
brainfuck
13th
Christmas Trees
5th
Divisors
1st
Emirp Numbers
8th
Emojify
Evil Numbers
15th
Fizz Buzz
12th
Happy Numbers
7th
Intersection
13th
Kolakoski Sequence
11th
Leap Years
30th
Leyland Numbers
2nd
Niven Numbers
40th
Ordinal Numbers
19th
Pangram Grep
Pernicious Numbers
27th
Poker
Prime Numbers
1st
Quine
1st
United States
8th
π
7th