12 Days of Christmas
679th
Christmas Trees
351st
Divisors
1st
Emirp Numbers
51st
Emirp Numbers (Long)
247th
Evil Numbers
1st
Evil Numbers (Long)
43rd
Fibonacci
197th
Fizz Buzz
68th20th
Foo Fizz Buzz Bar
1st
Leap Years
388th
Niven Numbers
158th
Pascal’s Triangle
221st
Prime Numbers
782nd
Quine
83rd
Smith Numbers
172nd
π
157th
τ
131st
√2
241st