12 Days of Christmas
39th
Collatz
57th
Divisors
131st
Evil Numbers
256th
Fibonacci
328th
Fizz Buzz
1st
Foo Fizz Buzz Bar
50th
Happy Numbers
72nd
Happy Numbers (Long)
39th
Kolakoski Sequence
80th
Leap Years
62nd
Leyland Numbers
38th
Look and Say
27th
Niven Numbers
112th
Pascal’s Triangle
67th
Pernicious Numbers
119th
Prime Numbers
53rd
Quine
29th
Recamán
65th
Tongue-twisters
88th