12 Days of Christmas
17th
Abundant Numbers
70th
brainfuck
31st
Christmas Trees
25th
Diamonds
20th
Divisors
83rd
Emirp Numbers
44th
Evil Numbers
81st
Fizz Buzz
123rd
Leap Years
99th
Odious Numbers
66th
Ordinal Numbers
31st
Pernicious Numbers
55th
Prime Numbers
67th
Quine
28th
Rock-paper-scissors-Spock-lizard
19th
Rule 110
23rd
Sierpiński Triangle
24th