12 Days of Christmas
44th
99 Bottles of Beer
19th
Abundant Numbers
53rd
Abundant Numbers (Long)
38th
Arabic to Roman
10th
Arithmetic Numbers
5th
Collatz
34th
Divisors
1st
Emirp Numbers
48th
Fibonacci
89th
Fizz Buzz
14th181st28th
Leap Years
28th
Leyland Numbers
14th
Niven Numbers
414th26th
Pascalβs Triangle
27th
Pernicious Numbers
41st
Prime Numbers
18th
Prime Numbers (Long)
1st
Van Eck Sequence
14th