12 Days of Christmas
13th
99 Bottles of Beer
18th
Abundant Numbers
56th31st
Arabic to Roman
7th
brainfuck
13th
Christmas Trees
74th
CSS Colors
9th12th
Cubes
10th
Diamonds
15th
Divisors
30th
Emirp Numbers
16th
Emojify
Evil Numbers
90th
Fibonacci
121st
Fizz Buzz
1st
Happy Numbers
17th
Leap Years
20th17th22nd1st18th
Leyland Numbers
23rd
Look and Say
40th
Lucky Tickets
24th
Morse Decoder
Morse Encoder
11th
Niven Numbers
61st31st
1st37th
Odious Numbers
86th
Ordinal Numbers
Pangram Grep
62nd
Pascal’s Triangle
69th
Pernicious Numbers
54th
Poker
Prime Numbers
102nd
Quine
30th
Rock-paper-scissors-Spock-lizard
Roman to Arabic
31st
Rule 110
38th
Seven Segment
13th
Sierpiński Triangle
36th14th
Spelling Numbers
18th
Ten-pin Bowling
Tongue-twisters
2nd
United States
λ
30th
π
59th
τ
52nd
φ
43rd
√2
47th
𝑒
55th