12 Days of Christmas
20th
534th
99 Bottles of Beer
301st
Arrows
140th
Catalan Numbers
117th
Christmas Trees
47th
Collatz
18th
Continued Fractions
10th
Divisors
52nd
497th
Evil Numbers
141st
Fizz Buzz
152nd
698th
Fractions
45th
Prime Numbers
131st
Quine
66th
77th
Recamán
4th
157th
Rijndael S-box
119th
Tongue-twisters
24th14th
Tower of Hanoi
87th
√2
134th