Abundant Numbers
17th
Abundant Numbers (Long)
3rd
Arithmetic Numbers
25th
Catalan Numbers
24th
Collatz
3rd
Divisors
43rd33rd
Evil Numbers
36th
135th
Evil Numbers (Long)
42nd
Fibonacci
116th
Fizz Buzz
11th3rd
Foo Fizz Buzz Bar
19th
Happy Numbers
30th
Happy Numbers (Long)
17th
Leap Years
49th
Leyland Numbers
26th
Niven Numbers
74th
Niven Numbers (Long)
36th
Odious Numbers
48th20th484th
Odious Numbers (Long)
36th
Pascal’s Triangle
35th48th
Pernicious Numbers
45th
Prime Numbers
45th
Prime Numbers (Long)
34th
Recamán
21st
Smith Numbers
25th
Sudoku
12th
Van Eck Sequence
18th