12 Days of Christmas
9th
99 Bottles of Beer
25th
Abundant Numbers
10th
Arrows
17th
ASCII Table
16th
Christmas Trees
36th
CSS Colors
16th
Cubes
15th
Diamonds
10th
Divisors
14th
Evil Numbers (Long)
50th
Fibonacci
94th
Fizz Buzz
53rd301st
Foo Fizz Buzz Bar
44th
Happy Numbers
22nd
ISBN
12th
Look and Say
18th
Niven Numbers (Long)
50th
Number Spiral
13th
Poker
15th
Quine
1st
Reverse Polish Notation
8th
Rule 110
18th
Time Distance
12th
Zodiac Signs
13th