12 Days of Christmas
41st
Collatz
82nd
Divisors
145th
Evil Numbers
295th
Fibonacci
378th
Fizz Buzz
1st
Foo Fizz Buzz Bar
64th
Happy Numbers
82nd
Happy Numbers (Long)
50th
Kolakoski Sequence
94th
Leap Years
90th
Leyland Numbers
42nd
Look and Say
31st
Niven Numbers
139th
Pascal’s Triangle
85th
Pernicious Numbers
143rd
Prime Numbers
69th
Quine
46th
Recamán
75th
Tongue-twisters
107th