12 Days of Christmas
14th
99 Bottles of Beer
113th
Abundant Numbers
41st
Arabic to Roman
11th
brainfuck
18th
Christmas Trees
47th
CSS Colors
51st
Diamonds
17th
Divisors
36th
Emirp Numbers
46th
Evil Numbers
50th
Fibonacci
87th
Fizz Buzz
62nd
Happy Numbers
27th
Leap Years
33rd
Leyland Numbers
25th
Morse Decoder
19th
Morse Encoder
19th
Niven Numbers
36th
Odious Numbers
43rd
Ordinal Numbers
Pangram Grep
20th
Pascal’s Triangle
37th
Pernicious Numbers
44th
Prime Numbers
29th
Quine
13th
Rock-paper-scissors-Spock-lizard
Roman to Arabic
21st
Rule 110
22nd
Seven Segment
22nd
Sierpiński Triangle
21st
Spelling Numbers
9th
Sudoku
United States
λ
10th
π
14th
τ
11th
φ
17th
√2
18th
𝑒
21st