Abundant Numbers
8th
Abundant Numbers (Long)
2nd
Arithmetic Numbers
22nd
Catalan Numbers
22nd
Collatz
28th
Divisors
43rd31st
Evil Numbers
36th
126th
Evil Numbers (Long)
37th
Fibonacci
109th
Fizz Buzz
11th3rd
Foo Fizz Buzz Bar
28th
Happy Numbers
25th
Happy Numbers (Long)
15th
Leap Years
68th
Leyland Numbers
23rd
Niven Numbers
68th
Niven Numbers (Long)
33rd
Odious Numbers
43rd18th468th
Odious Numbers (Long)
33rd
Pascal’s Triangle
34th43rd
Pernicious Numbers
43rd
Prime Numbers
41st
Prime Numbers (Long)
34th
Recamán
20th
Smith Numbers
23rd
Sudoku
9th
Van Eck Sequence
18th