12 Days of Christmas
690th
Christmas Trees
354th
Divisors
1st
Emirp Numbers
51st
Emirp Numbers (Long)
250th
Evil Numbers
1st
Evil Numbers (Long)
44th
Fibonacci
204th
Fizz Buzz
74th20th
Foo Fizz Buzz Bar
1st
Leap Years
395th
Niven Numbers
161st
Pascal’s Triangle
224th
Prime Numbers
788th
Quine
85th
Smith Numbers
177th
π
163rd
τ
137th
√2
248th