12 Days of Christmas
14th
99 Bottles of Beer
108th
Abundant Numbers
36th
Arabic to Roman
10th
brainfuck
17th
Christmas Trees
45th
CSS Colors
45th
Diamonds
12th
Divisors
30th
Emirp Numbers
42nd
Evil Numbers
44th
Fibonacci
72nd
Fizz Buzz
60th
Happy Numbers
24th
Leap Years
24th
Leyland Numbers
22nd
Morse Decoder
17th
Morse Encoder
18th
Niven Numbers
29th
Odious Numbers
38th
Ordinal Numbers
Pangram Grep
16th
Pascal’s Triangle
33rd
Pernicious Numbers
35th
Prime Numbers
22nd
Quine
11th
Rock-paper-scissors-Spock-lizard
Roman to Arabic
19th
Rule 110
19th
Seven Segment
21st
Sierpiński Triangle
20th
Spelling Numbers
8th
Sudoku
7th
United States
λ
9th
π
12th
τ
10th
φ
√2
14th
𝑒
15th