12 Days of Christmas
15th
Abundant Numbers
57th
brainfuck
24th
Christmas Trees
22nd
Diamonds
17th
Divisors
66th
Emirp Numbers
35th
Evil Numbers
68th
Fizz Buzz
108th
Leap Years
81st
Odious Numbers
56th
Ordinal Numbers
26th
Pernicious Numbers
39th
Prime Numbers
54th
Quine
11th
Rock-paper-scissors-Spock-lizard
15th
Rule 110
20th
Sierpiński Triangle
23rd