Abundant Numbers
41st
Abundant Numbers (Long)
104th
Arithmetic Numbers
81st
Collatz
193rd
CSS Colors
115th
Divisors
3rd
Emirp Numbers
17th
Evil Numbers
1st
Evil Numbers (Long)
47th
Factorial Factorisation
82nd
Fibonacci
1st
Fizz Buzz
52nd
Happy Numbers
1st
Kolakoski Sequence
59th
Leap Years
18th
ln 2
50th
Look and Say
45th
Lucky Numbers
82nd
Niven Numbers
54th
Niven Numbers (Long)
122nd
Odious Numbers
1st
Odious Numbers (Long)
99th
Ordinal Numbers
5th
Pangram Grep
30th
Pascal’s Triangle
49th
Pernicious Numbers
86th
Prime Numbers
101st
Quine
1st
Recamán
42nd
Rock-paper-scissors-Spock-lizard
39th
Roman to Arabic
54th
ROT13
114th
Sierpiński Triangle
25th
Tic-tac-toe
95th
π
128th
τ
115th
√2
1st
𝑒
1st