12 Days of Christmas
142nd
Collatz
66th
Divisors
140th
Evil Numbers
279th
Fibonacci
348th
Fizz Buzz
1st
Foo Fizz Buzz Bar
48th
Happy Numbers
67th
Happy Numbers (Long)
41st
Kolakoski Sequence
83rd
Leap Years
74th
Leyland Numbers
37th
Look and Say
27th
Niven Numbers
128th
Pascal’s Triangle
74th
Pernicious Numbers
125th
Prime Numbers
59th
Quine
30th
Recamán
68th
Tongue-twisters
84th