99 Bottles of Beer
4th
Abundant Numbers
13th
Abundant Numbers (Long)
13th
Arabic to Roman
1st
Arithmetic Numbers
9th
Ascending Primes
4th
Christmas Trees
8th
Collatz
14th
Day of Week
1st
Divisors
15th
Emirp Numbers
10th
Emirp Numbers (Long)
6th
Evil Numbers
13th
Evil Numbers (Long)
11th
Farey Sequence
7th
Fibonacci
16th
Fizz Buzz
4th
Foo Fizz Buzz Bar
8th
Happy Numbers
12th
Happy Numbers (Long)
11th
Kolakoski Sequence
6th
Leap Years
12th
Leyland Numbers
8th
Look and Say
7th
Lucky Numbers
11th
Niven Numbers
20th
Niven Numbers (Long)
13th
Odious Numbers
13th
Odious Numbers (Long)
12th
PalindromemordnilaP
4th
Pascal’s Triangle
1st
Pernicious Numbers
19th
Pernicious Numbers (Long)
6th
Prime Numbers
11th
Prime Numbers (Long)
9th
Quine
18th
Recamán
7th
Roman to Arabic
27th
Sierpiński Triangle
8th
United States
1st
Van Eck Sequence
8th
π
5th