Abundant Numbers
60th
Divisors
59th649th
Emirp Numbers
31st
Evil Numbers
83rd845th
Fibonacci
151st1,163rd
Fizz Buzz
143rd
Happy Numbers
56th
Leap Years
73rd569th
Niven Numbers
89th
Odious Numbers
71st
Pangram Grep
28th
Pascal’s Triangle
48th
Pernicious Numbers
49th
Prime Numbers
98th613th
Quine
79th