Abundant Numbers
17th
Abundant Numbers (Long)
3rd
Arithmetic Numbers
26th
Catalan Numbers
25th
Collatz
3rd
Divisors
44th33rd
Evil Numbers
37th
143rd
Evil Numbers (Long)
46th
Fibonacci
119th
Fizz Buzz
11th3rd
Foo Fizz Buzz Bar
20th
Happy Numbers
30th
Happy Numbers (Long)
17th
Leap Years
49th
Leyland Numbers
26th
Niven Numbers
75th
Niven Numbers (Long)
38th
Odious Numbers
51st21st500th
Odious Numbers (Long)
39th
Pascal’s Triangle
37th53rd
Pernicious Numbers
47th
Prime Numbers
45th
Prime Numbers (Long)
35th
Recamán
22nd
Smith Numbers
25th
Sudoku
13th
Van Eck Sequence
18th