Abundant Numbers
59th
Divisors
56th637th
Emirp Numbers
31st
Evil Numbers
81st832nd
Fibonacci
148th1,144th
Fizz Buzz
142nd
Happy Numbers
56th
Leap Years
72nd552nd
Niven Numbers
87th
Odious Numbers
70th
Pangram Grep
28th
Pascal’s Triangle
48th
Pernicious Numbers
49th
Prime Numbers
96th598th
Quine
79th