12 Days of Christmas
9th
99 Bottles of Beer
21st
Abundant Numbers
8th
Arrows
17th
ASCII Table
15th
Christmas Trees
35th
CSS Colors
13th
Cubes
13th
Diamonds
8th
Divisors
13th
Evil Numbers (Long)
38th
Fibonacci
75th
Fizz Buzz
48th281st
Foo Fizz Buzz Bar
39th
Happy Numbers
21st
ISBN
12th
Look and Say
15th
Niven Numbers (Long)
38th
Number Spiral
11th
Poker
11th
Quine
1st
Reverse Polish Notation
8th
Rule 110
18th
Time Distance
12th
Zodiac Signs
13th