12 Days of Christmas
21st
ASCII Table
32nd
19th
Fizz Buzz
72nd
Foo Fizz Buzz Bar
373rd
Happy Numbers
30th
648th
Leap Years
107th1,091st
ln 2
15th
Niven Numbers
40th87th
773rd
Number Spiral
27th
15th
15th
Prime Numbers
59th101st
1,076th
Quine
84th
821st
Recamán
13th
Smith Numbers
8th
Tongue-twisters
27th
π
513th