Abundant Numbers
17th
Abundant Numbers (Long)
3rd
Arithmetic Numbers
27th
Catalan Numbers
25th
Collatz
3rd
Divisors
45th34th
Evil Numbers
37th
144th
Evil Numbers (Long)
46th
Fibonacci
121st
Fizz Buzz
11th3rd
Foo Fizz Buzz Bar
20th
Happy Numbers
30th
Happy Numbers (Long)
17th
Leap Years
49th
Leyland Numbers
27th
Niven Numbers
76th
Niven Numbers (Long)
40th
Odious Numbers
51st22nd502nd
Odious Numbers (Long)
39th
Pascal’s Triangle
38th53rd
Pernicious Numbers
47th
Prime Numbers
47th
Prime Numbers (Long)
37th
Recamán
22nd
Smith Numbers
25th
Sudoku
13th
Van Eck Sequence
18th