12 Days of Christmas
41st
Collatz
61st
Divisors
138th
Evil Numbers
271st
Fibonacci
340th
Fizz Buzz
1st
Foo Fizz Buzz Bar
52nd
Happy Numbers
74th
Happy Numbers (Long)
39th
Kolakoski Sequence
82nd
Leap Years
68th
Leyland Numbers
39th
Look and Say
27th
Niven Numbers
124th
Pascal’s Triangle
74th
Pernicious Numbers
125th
Prime Numbers
58th
Quine
30th
Recamán
67th
Tongue-twisters
97th