Abundant Numbers
17th
Abundant Numbers (Long)
3rd
Arithmetic Numbers
24th
Catalan Numbers
23rd
Collatz
3rd
Divisors
43rd33rd
Evil Numbers
36th
133rd
Evil Numbers (Long)
40th
Fibonacci
115th
Fizz Buzz
11th3rd
Foo Fizz Buzz Bar
18th
Happy Numbers
29th
Happy Numbers (Long)
16th
Leap Years
48th
Leyland Numbers
26th
Niven Numbers
72nd
Niven Numbers (Long)
32nd
Odious Numbers
45th19th482nd
Odious Numbers (Long)
34th
Pascal’s Triangle
35th46th
Pernicious Numbers
44th
Prime Numbers
41st
Prime Numbers (Long)
33rd
Recamán
20th
Smith Numbers
25th
Sudoku
11th
Van Eck Sequence
18th