12 Days of Christmas
15th
99 Bottles of Beer
20th
Abundant Numbers
74th
Arabic to Roman
9th
brainfuck
8th
Christmas Trees
31st
Diamonds
16th
Divisors
91st
Emirp Numbers
33rd
Evil Numbers
30th
Fibonacci
72nd
Fizz Buzz
89th336th
Happy Numbers
38th
Leap Years
92nd
Niven Numbers
48th
Odious Numbers
30th
Ordinal Numbers
17th
Pangram Grep
36th
Pascal’s Triangle
44th
Pernicious Numbers
43rd
Prime Numbers
80th
Quine
80th
Roman to Arabic
33rd
Rule 110
23rd
Seven Segment
16th
Sierpiński Triangle
23rd
Spelling Numbers
8th
π
33rd
𝑒
33rd