12 Days of Christmas
41st
Collatz
64th
Divisors
139th
Evil Numbers
277th
Fibonacci
343rd
Fizz Buzz
1st
Foo Fizz Buzz Bar
52nd
Happy Numbers
74th
Happy Numbers (Long)
39th
Kolakoski Sequence
82nd
Leap Years
70th
Leyland Numbers
40th
Look and Say
27th
Niven Numbers
126th
Pascal’s Triangle
74th
Pernicious Numbers
124th
Prime Numbers
58th
Quine
30th
Recamán
67th
Tongue-twisters
101st