Abundant Numbers
8th
Abundant Numbers (Long)
2nd
Arithmetic Numbers
26th
Catalan Numbers
24th
Collatz
31st
Divisors
43rd33rd
Evil Numbers
36th
135th
Evil Numbers (Long)
42nd
Fibonacci
117th
Fizz Buzz
11th3rd
Foo Fizz Buzz Bar
30th
Happy Numbers
27th
Happy Numbers (Long)
18th
Leap Years
71st
Leyland Numbers
26th
Niven Numbers
74th
Niven Numbers (Long)
38th
Odious Numbers
48th20th484th
Odious Numbers (Long)
36th
Pascal’s Triangle
36th48th
Pernicious Numbers
45th
Prime Numbers
45th
Prime Numbers (Long)
35th
Recamán
21st
Smith Numbers
26th
Sudoku
10th
Van Eck Sequence
19th