Abundant Numbers
55th
Divisors
55th624th
Emirp Numbers
31st
Evil Numbers
80th814th
Fibonacci
145th1,123rd
Fizz Buzz
141st
Happy Numbers
56th
Leap Years
72nd540th
Niven Numbers
86th
Odious Numbers
70th
Pangram Grep
28th
Pascal’s Triangle
47th
Pernicious Numbers
47th
Prime Numbers
93rd585th
Quine
78th