Abundant Numbers
17th
Arithmetic Numbers
9th
Catalan Numbers
16th
Divisors
44th
Evil Numbers
24th
Evil Numbers (Long)
18th
Fibonacci
24th
Fizz Buzz
14th
Foo Fizz Buzz Bar
12th
Happy Numbers
18th
Happy Numbers (Long)
14th
Leap Years
16th
Leyland Numbers
20th
Niven Numbers
7th
Niven Numbers (Long)
11th
Odious Numbers
1st
Odious Numbers (Long)
21st
Pascal’s Triangle
43rd
Pernicious Numbers
26th
Prime Numbers
71st
Prime Numbers (Long)
61st
Smith Numbers
6th