12 Days of Christmas
7th
99 Bottles of Beer
19th
Abundant Numbers
8th
Arrows
15th
ASCII Table
14th
Christmas Trees
31st
CSS Colors
10th
Cubes
10th
Diamonds
8th
Divisors
12th
Evil Numbers (Long)
27th
Fibonacci
65th
Fizz Buzz
34th
237thFoo Fizz Buzz Bar
31st
Happy Numbers
18th
ISBN
9th
Look and Say
14th
Niven Numbers (Long)
32nd
Number Spiral
9th
Poker
8th
Quine
1st
Reverse Polish Notation
7th
Rule 110
14th
Time Distance
9th
Zodiac Signs
11th