Abundant Numbers
8th
Abundant Numbers (Long)
2nd
Arithmetic Numbers
22nd
Catalan Numbers
21st
Collatz
26th
Divisors
43rd31st
Evil Numbers
35th
120th
Evil Numbers (Long)
35th
Fibonacci
104th
Fizz Buzz
11th3rd
Foo Fizz Buzz Bar
28th
Happy Numbers
24th
Happy Numbers (Long)
15th
Leap Years
67th
Leyland Numbers
23rd
Niven Numbers
66th
Niven Numbers (Long)
31st
Odious Numbers
42nd18th458th
Odious Numbers (Long)
30th
Pascal’s Triangle
33rd41st
Pernicious Numbers
41st
Prime Numbers
41st
Prime Numbers (Long)
34th
Recamán
19th
Smith Numbers
23rd
Sudoku
9th
Van Eck Sequence
18th