12 Days of Christmas
14th
99 Bottles of Beer
113th
Abundant Numbers
40th
Arabic to Roman
11th
brainfuck
18th
Christmas Trees
47th
CSS Colors
50th
Diamonds
17th
Divisors
34th
Emirp Numbers
45th
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
19th
Pascal’s Triangle
36th
Pernicious Numbers
42nd
Prime Numbers
28th
Quine
12th
Rock-paper-scissors-Spock-lizard
Roman to Arabic
21st
Rule 110
22nd
Seven Segment
22nd
Sierpiński Triangle
20th
Spelling Numbers
9th
Sudoku
United States
λ
10th
π
14th
τ
11th
φ
17th
√2
17th
𝑒
20th