12 Days of Christmas
15th
Abundant Numbers
66th
brainfuck
26th
Christmas Trees
23rd
Diamonds
17th
Divisors
75th
Emirp Numbers
41st
Evil Numbers
74th
Fizz Buzz
119th
Leap Years
89th
Odious Numbers
64th
Ordinal Numbers
28th
Pernicious Numbers
48th
Prime Numbers
59th
Quine
21st
Rock-paper-scissors-Spock-lizard
16th
Rule 110
21st
Sierpiński Triangle
23rd