12 Days of Christmas
665th
Christmas Trees
341st
Divisors
1st
Emirp Numbers
50th
Emirp Numbers (Long)
237th
Evil Numbers
1st
Evil Numbers (Long)
41st
Fibonacci
193rd
Fizz Buzz
62nd20th
Foo Fizz Buzz Bar
1st
Leap Years
381st
Niven Numbers
154th
Pascal’s Triangle
218th
Prime Numbers
771st
Quine
79th
Smith Numbers
167th
π
153rd
τ
126th
√2
234th