Abundant Numbers
Abundant Numbers (Long)
Arithmetic Numbers
Catalan Numbers
19th
Collatz
Divisors
42nd31st
Evil Numbers
34th
112th
Evil Numbers (Long)
Fibonacci
103rd
Fizz Buzz
11th1st
Foo Fizz Buzz Bar
16th
Happy Numbers
Happy Numbers (Long)
Leap Years
45th
Leyland Numbers
19th
Niven Numbers
62nd
Niven Numbers (Long)
28th
Odious Numbers
17th442nd
Odious Numbers (Long)
Pascal’s Triangle
38th
Pernicious Numbers
Prime Numbers
39th
Prime Numbers (Long)
30th
Recamán
19th
Smith Numbers
Sudoku
10th
Van Eck Sequence