Abundant Numbers
Abundant Numbers (Long)
Arithmetic Numbers
Catalan Numbers
20th
Collatz
Divisors
42nd31st
Evil Numbers
34th
112th
Evil Numbers (Long)
Fibonacci
103rd
Fizz Buzz
11th1st
Foo Fizz Buzz Bar
17th
Happy Numbers
Happy Numbers (Long)
Leap Years
45th
Leyland Numbers
20th
Niven Numbers
62nd
Niven Numbers (Long)
29th
Odious Numbers
17th446th
Odious Numbers (Long)
Pascal’s Triangle
39th
Pernicious Numbers
Prime Numbers
39th
Prime Numbers (Long)
30th
Recamán
19th
Smith Numbers
Sudoku
10th
Van Eck Sequence