12 Days of Christmas
42nd
99 Bottles of Beer
471st
21st
Abundant Numbers
49th
Arabic to Roman
34th
brainfuck
19th
Christmas Trees
69th
CSS Colors
35th
Cubes
29th
Diamonds
54th
Divisors
465th
71st
Emirp Numbers
84th
Evil Numbers
52nd
Fibonacci
61st
Fizz Buzz
1,117th
77th
Happy Numbers
74th
Leap Years
21st
Leyland Numbers
39th
Lucky Tickets
Morse Decoder
23rd
Morse Encoder
25th
Niven Numbers
42nd
Odious Numbers
46th
Ordinal Numbers
1st
22nd
Pangram Grep
54th
Pascal’s Triangle
39th
Pernicious Numbers
51st
Prime Numbers
61st
Quine
99th
100th
Rock-paper-scissors-Spock-lizard
34th
Roman to Arabic
38th
Rule 110
28th
Seven Segment
21st
Sierpiński Triangle
24th
Spelling Numbers
15th
Sudoku
46th
15th
United States
33rd
Vampire Numbers
26th
λ
22nd
π
38th
τ
36th29th
φ
37th
√2
32nd
𝑒
36th