12 Days of Christmas
660th
Christmas Trees
337th
Divisors
1st
Emirp Numbers
50th
Emirp Numbers (Long)
234th
Evil Numbers
1st
Evil Numbers (Long)
41st
Fibonacci
190th
Fizz Buzz
60th20th
Foo Fizz Buzz Bar
1st
Leap Years
377th
Niven Numbers
152nd
Pascal’s Triangle
214th
Prime Numbers
767th
Quine
75th
Smith Numbers
164th
π
149th
τ
122nd
√2
229th