12 Days of Christmas
104th
77th
99 Bottles of Beer
53rd
Christmas Trees
334th
31st
Cubes
29th
Diamonds
41st
Divisors
402nd
63rd
Emirp Numbers
377th
70th
Evil Numbers
70th
Fibonacci
743rd
52nd
Fizz Buzz
59th
Happy Numbers
59th
Leap Years
79th
Morse Decoder
23rd
Morse Encoder
20th
Niven Numbers
65th
Odious Numbers
53rd
Ordinal Numbers
69th
41st
Pangram Grep
69th
Pascal’s Triangle
57th
Pernicious Numbers
52nd
Prime Numbers
20th
Quine
84th
Rock-paper-scissors-Spock-lizard
208th
27th
Roman to Arabic
44th
Rule 110
39th
Seven Segment
35th
Sierpiński Triangle
33rd
λ
24th
π
89th
126th
71st
τ
48th
φ
52nd
√2
47th
𝑒
57th