12 Days of Christmas
683rd
Christmas Trees
353rd
Divisors
1st
Emirp Numbers
51st
Emirp Numbers (Long)
248th
Evil Numbers
1st
Evil Numbers (Long)
44th
Fibonacci
200th
Fizz Buzz
69th20th
Foo Fizz Buzz Bar
1st
Leap Years
394th
Niven Numbers
160th
Pascal’s Triangle
222nd
Prime Numbers
785th
Quine
84th
Smith Numbers
175th
π
161st
τ
134th
√2
244th