12 Days of Christmas
15th
Abundant Numbers
56th
brainfuck
24th
Christmas Trees
22nd
Diamonds
17th
Divisors
66th
Emirp Numbers
35th
Evil Numbers
67th
Fizz Buzz
107th
Leap Years
80th
Odious Numbers
56th
Ordinal Numbers
26th
Pernicious Numbers
39th
Prime Numbers
54th
Quine
5th
Rock-paper-scissors-Spock-lizard
15th
Rule 110
20th
Sierpiński Triangle
22nd