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
27th
Happy Numbers
Happy Numbers (Long)
Leap Years
66th
Leyland Numbers
19th
Niven Numbers
62nd
Niven Numbers (Long)
29th
Odious Numbers
17th440th
Odious Numbers (Long)
Pascal’s Triangle
38th
Pernicious Numbers
Prime Numbers
39th
Prime Numbers (Long)
31st
Recamán
19th
Smith Numbers
Sudoku
9th
Van Eck Sequence