12 Days of Christmas
21st
ASCII Table
32nd
19th
Fizz Buzz
72nd
Foo Fizz Buzz Bar
346th
Happy Numbers
30th
646th
Leap Years
107th1,090th
ln 2
15th
Niven Numbers
40th87th
766th
Number Spiral
27th
15th
15th
Prime Numbers
59th100th
1,074th
Quine
84th
821st
Recamán
13th
Smith Numbers
8th
Tongue-twisters
27th
π
506th