12 Days of Christmas
606th
Christmas Trees
304th
Divisors
1st
Emirp Numbers
50th
Emirp Numbers (Long)
212th
Evil Numbers
1st
Evil Numbers (Long)
33rd
Fibonacci
166th
Fizz Buzz
54th20th
Foo Fizz Buzz Bar
1st
Leap Years
354th
Niven Numbers
129th
Pascal’s Triangle
201st
Prime Numbers
729th
Quine
63rd
Smith Numbers
149th
π
132nd
τ
109th
√2
210th