12 Days of Christmas
595th
Christmas Trees
312th
Divisors
101st
Emirp Numbers
49th
Emirp Numbers (Long)
200th
Evil Numbers
1st
Evil Numbers (Long)
32nd
Fibonacci
158th
Fizz Buzz
186th20th
Foo Fizz Buzz Bar
111th
Leap Years
346th
Niven Numbers
122nd
Pascal’s Triangle
198th
Prime Numbers
721st
Quine
58th
Smith Numbers
148th
π
144th
τ
116th
√2
222nd