Abundant Numbers
8th
Abundant Numbers (Long)
2nd
Catalan Numbers
16th
Collatz
27th
Divisors
35th
30th
Evil Numbers
32nd
98thEvil Numbers (Long)
25th
Fibonacci
90th
Fizz Buzz
9th
1st
Foo Fizz Buzz Bar
21st
Happy Numbers
21st
Happy Numbers (Long)
14th
Leap Years
63rd
Leyland Numbers
20th
Niven Numbers
60th
Niven Numbers (Long)
25th
Odious Numbers
35th
16th
382ndOdious Numbers (Long)
22nd
Pascal’s Triangle
29th
32nd
Pernicious Numbers
34th
Prime Numbers
37th
Prime Numbers (Long)
30th
Recamán
16th
Smith Numbers
20th
Sudoku
8th
Van Eck Sequence
16th