Abundant Numbers
10th
Abundant Numbers (Long)
2nd
Arithmetic Numbers
27th
Catalan Numbers
25th
Collatz
32nd
Divisors
45th34th
Evil Numbers
37th
145th
Evil Numbers (Long)
47th
Fibonacci
121st
Fizz Buzz
11th3rd
Foo Fizz Buzz Bar
30th
Happy Numbers
27th
Happy Numbers (Long)
18th
Leap Years
73rd
Leyland Numbers
27th
Niven Numbers
77th
Niven Numbers (Long)
41st
Odious Numbers
51st23rd500th
Odious Numbers (Long)
40th
Pascal’s Triangle
39th53rd
Pernicious Numbers
48th
Prime Numbers
47th
Prime Numbers (Long)
38th
Recamán
22nd
Smith Numbers
26th
Sudoku
11th
Van Eck Sequence
19th