Abundant Numbers
51st
Abundant Numbers (Long)
27th
Collatz
123rd
CSS Colors
135th
Divisors
1st
Emirp Numbers
99th
Evil Numbers
120th
Evil Numbers (Long)
33rd
Fibonacci
1st
Fizz Buzz
54th
Happy Numbers
51st
Kolakoski Sequence
119th
Leap Years
13th
ln 2
54th
Look and Say
83rd
Lucky Numbers
61st
Niven Numbers
34th
Niven Numbers (Long)
82nd
Odious Numbers
85th
Odious Numbers (Long)
70th
Ordinal Numbers
64th
Pangram Grep
36th
Pascal’s Triangle
75th
Pernicious Numbers
67th
Prime Numbers
72nd
Quine
1st
Recamán
66th
Rock-paper-scissors-Spock-lizard
69th
Roman to Arabic
96th
ROT13
76th
Sierpiński Triangle
34th
Tic-tac-toe
55th
π
89th
τ
86th
√2
1st
𝑒
1st