12 Days of Christmas
621st
Christmas Trees
312th
Divisors
1st
Emirp Numbers
50th
Emirp Numbers (Long)
219th
Evil Numbers
1st
Evil Numbers (Long)
35th
Fibonacci
178th
Fizz Buzz
54th20th
Foo Fizz Buzz Bar
1st
Leap Years
360th
Niven Numbers
136th
Pascal’s Triangle
206th
Prime Numbers
742nd
Quine
67th
Smith Numbers
156th
π
135th
τ
114th
√2
215th