12 Days of Christmas
15th
99 Bottles of Beer
21st
Abundant Numbers
16th
Arrows
17th
ASCII Table
15th
Christmas Trees
32nd
CSS Colors
12th
Cubes
12th
Diamonds
9th
Divisors
12th
Evil Numbers (Long)
36th
Fibonacci
69th
Fizz Buzz
38th
263rd
Foo Fizz Buzz Bar
34th
Happy Numbers
14th
ISBN
11th
Look and Say
14th
Niven Numbers (Long)
35th
Number Spiral
10th
Poker
9th
Quine
1st
Reverse Polish Notation
7th
Rule 110
18th
Time Distance
10th
Zodiac Signs
12th