12 Days of Christmas
641st
Christmas Trees
334th
Divisors
114th
Emirp Numbers
50th
Emirp Numbers (Long)
223rd
Evil Numbers
1st
Evil Numbers (Long)
35th
Fibonacci
178th
Fizz Buzz
205th20th
Foo Fizz Buzz Bar
126th
Leap Years
366th
Niven Numbers
136th
Pascal’s Triangle
218th
Prime Numbers
753rd
Quine
67th
Smith Numbers
162nd
π
157th
τ
128th
√2
242nd