Abundant Numbers
17th
Abundant Numbers (Long)
3rd
Arithmetic Numbers
24th
Catalan Numbers
23rd
Collatz
3rd
Divisors
43rd31st
Evil Numbers
36th
128th
Evil Numbers (Long)
37th
Fibonacci
110th
Fizz Buzz
11th3rd
Foo Fizz Buzz Bar
18th
Happy Numbers
28th
Happy Numbers (Long)
15th
Leap Years
47th
Leyland Numbers
25th
Niven Numbers
70th
Niven Numbers (Long)
32nd
Odious Numbers
44th18th474th
Odious Numbers (Long)
33rd
Pascal’s Triangle
35th45th
Pernicious Numbers
44th
Prime Numbers
41st
Prime Numbers (Long)
33rd
Recamán
20th
Smith Numbers
25th
Sudoku
10th
Van Eck Sequence
17th