Abundant Numbers
21st
Arithmetic Numbers
10th
Catalan Numbers
15th
Divisors
44th
Evil Numbers
25th
Evil Numbers (Long)
19th
Fibonacci
23rd
Fizz Buzz
14th
Foo Fizz Buzz Bar
12th
Happy Numbers
27th
Happy Numbers (Long)
21st
Leap Years
18th
Leyland Numbers
20th
Niven Numbers
13th
Niven Numbers (Long)
17th
Odious Numbers
1st
Odious Numbers (Long)
23rd
Pascalβs Triangle
41st
Pernicious Numbers
26th
Prime Numbers
67th
Prime Numbers (Long)
57th
Smith Numbers
10th