12 Days of Christmas
16th
99 Bottles of Beer
9th
Abundant Numbers
20th
brainfuck
Christmas Trees
11th
Cubes
9th
Diamonds
8th
Divisors
19th
Emirp Numbers
36th
Evil Numbers
43rd
Fibonacci
19th109th
Fizz Buzz
10th
Hexdump
4th
Kaprekar Numbers
14th
Lucky Tickets
Morse Decoder
8th
Niven Numbers
31st
Odious Numbers
39th
PalindromemordnilaP
6th
Pangram Grep
13th
Partition Numbers
10th
Pernicious Numbers
43rd
Prime Numbers
57th
Recamán
19th
Rijndael S-box
7th
ROT13
15th
Scrambled Sort
5th
United States
19th
π
16th
τ
14th
φ
29th
√2
33rd