Abundant Numbers
21st
Arithmetic Numbers
12th
Catalan Numbers
17th
Divisors
50th
Evil Numbers
30th
Evil Numbers (Long)
24th
Fibonacci
27th
Fizz Buzz
17th
Foo Fizz Buzz Bar
14th
Happy Numbers
23rd
Happy Numbers (Long)
20th
Leap Years
20th
Leyland Numbers
23rd
Niven Numbers
9th
Niven Numbers (Long)
15th
Odious Numbers
1st
Odious Numbers (Long)
25th
Pascal’s Triangle
52nd
Pernicious Numbers
28th
Prime Numbers
79th
Prime Numbers (Long)
69th
Smith Numbers
9th