Abundant Numbers
10th
Abundant Numbers (Long)
2nd
Arithmetic Numbers
26th
Catalan Numbers
25th
Collatz
31st
Divisors
44th33rd
Evil Numbers
37th
140th
Evil Numbers (Long)
45th
Fibonacci
118th
Fizz Buzz
11th3rd
Foo Fizz Buzz Bar
30th
Happy Numbers
27th
Happy Numbers (Long)
18th
Leap Years
72nd
Leyland Numbers
26th
Niven Numbers
74th
Niven Numbers (Long)
39th
Odious Numbers
50th21st494th
Odious Numbers (Long)
38th
Pascal’s Triangle
37th53rd
Pernicious Numbers
47th
Prime Numbers
45th
Prime Numbers (Long)
36th
Recamán
22nd
Smith Numbers
26th
Sudoku
10th
Van Eck Sequence
19th