Abundant Numbers
17th
Arithmetic Numbers
10th
Catalan Numbers
17th
Divisors
46th
Evil Numbers
26th
Evil Numbers (Long)
20th
Fibonacci
24th
Fizz Buzz
15th
Foo Fizz Buzz Bar
13th
Happy Numbers
21st
Happy Numbers (Long)
17th
Leap Years
16th
Leyland Numbers
20th
Niven Numbers
7th
Niven Numbers (Long)
12th
Odious Numbers
1st
Odious Numbers (Long)
23rd
Pascal’s Triangle
47th
Pernicious Numbers
27th
Prime Numbers
73rd
Prime Numbers (Long)
63rd
Smith Numbers
5th