12 Days of Christmas
133rd
Collatz
57th
Divisors
131st
Evil Numbers
256th
Fibonacci
327th
Fizz Buzz
1st
Foo Fizz Buzz Bar
46th
Happy Numbers
65th
Happy Numbers (Long)
39th
Kolakoski Sequence
80th
Leap Years
62nd
Leyland Numbers
35th
Look and Say
27th
Niven Numbers
112th
Pascal’s Triangle
67th
Pernicious Numbers
119th
Prime Numbers
53rd
Quine
29th
Recamán
65th
Tongue-twisters
74th