12 Days of Christmas
40th
Collatz
59th
Divisors
134th
Evil Numbers
265th
Fibonacci
334th
Fizz Buzz
1st
Foo Fizz Buzz Bar
52nd
Happy Numbers
74th
Happy Numbers (Long)
39th
Kolakoski Sequence
82nd
Leap Years
65th
Leyland Numbers
38th
Look and Say
27th
Niven Numbers
117th
Pascal’s Triangle
70th
Pernicious Numbers
123rd
Prime Numbers
56th
Quine
29th
Recamán
65th
Tongue-twisters
91st