12 Days of Christmas
113th
99 Bottles of Beer
109th
Abundant Numbers
37th
Arabic to Roman
9th
brainfuck
16th
Christmas Trees
45th
CSS Colors
47th
Diamonds
13th
Divisors
32nd
Emirp Numbers
43rd
Evil Numbers
46th
Fibonacci
84th
Fizz Buzz
61st
Happy Numbers
24th
Leap Years
30th
Leyland Numbers
23rd
Morse Decoder
17th
Morse Encoder
17th
Niven Numbers
31st
Odious Numbers
39th
Ordinal Numbers
Pangram Grep
17th
Pascal’s Triangle
34th
Pernicious Numbers
34th
Prime Numbers
23rd
Quine
12th
Rock-paper-scissors-Spock-lizard
Roman to Arabic
18th
Rule 110
19th
Seven Segment
20th
Sierpiński Triangle
20th
Spelling Numbers
7th
Sudoku
United States
λ
12th
π
12th
τ
10th
φ
15th
√2
16th
𝑒
19th