Abundant Numbers
10th
Abundant Numbers (Long)
2nd
Arithmetic Numbers
28th
Catalan Numbers
29th
Collatz
32nd
Divisors
45th34th
Evil Numbers
40th
156th
Evil Numbers (Long)
48th
Fibonacci
125th
Fizz Buzz
11th3rd
Foo Fizz Buzz Bar
30th
Happy Numbers
28th
Happy Numbers (Long)
19th
Leap Years
75th
Leyland Numbers
27th
Niven Numbers
79th
Niven Numbers (Long)
43rd
Odious Numbers
55th25th513th
Odious Numbers (Long)
42nd
Pascal’s Triangle
40th53rd
Pernicious Numbers
52nd
Prime Numbers
47th
Prime Numbers (Long)
38th
Recamán
22nd
Smith Numbers
26th
Sudoku
10th
Van Eck Sequence
18th