12 Days of Christmas
76th
99 Bottles of Beer
84th
Abundant Numbers
65th
Christmas Trees
40th
Cubes
16th
Diamonds
36th
Divisors
76th
Emirp Numbers
31st
Evil Numbers
64th
Fibonacci
59th
Fizz Buzz
119th
Happy Numbers
33rd
Leap Years
100th
Morse Decoder
15th
Morse Encoder
15th
Niven Numbers
79th
Odious Numbers
65th
Ordinal Numbers
34th
Pangram Grep
49th
Pascal’s Triangle
33rd
Pernicious Numbers
58th
Prime Numbers
82nd
Rule 110
30th
Seven Segment
15th
Sierpiński Triangle
39th
United States
λ
16th
π
37th
τ
20th
φ
23rd
√2
25th
𝑒
25th