Abundant Numbers
17th
Abundant Numbers (Long)
3rd
Arithmetic Numbers
26th
Catalan Numbers
24th
Collatz
3rd
Divisors
44th33rd
Evil Numbers
36th
138th
Evil Numbers (Long)
44th
Fibonacci
117th
Fizz Buzz
11th3rd
Foo Fizz Buzz Bar
20th
Happy Numbers
30th
Happy Numbers (Long)
17th
Leap Years
49th
Leyland Numbers
26th
Niven Numbers
74th
Niven Numbers (Long)
37th
Odious Numbers
49th20th491st
Odious Numbers (Long)
37th
Pascal’s Triangle
36th50th
Pernicious Numbers
45th
Prime Numbers
45th
Prime Numbers (Long)
34th
Recamán
21st
Smith Numbers
25th
Sudoku
12th
Van Eck Sequence
18th