12 Days of Christmas
20th
ASCII Table
32nd
18th
Fizz Buzz
73rd
Foo Fizz Buzz Bar
345th
Happy Numbers
30th
641st
Leap Years
106th1,085th
ln 2
15th
Niven Numbers
40th86th
761st
Number Spiral
27th
14th
14th
Prime Numbers
59th99th
1,069th
Quine
84th
811th
Recamán
13th
Smith Numbers
8th
Tongue-twisters
27th
π
505th