99 Bottles of Beer
26th
Abundant Numbers
34th
Arabic to Roman
19th
Christmas Trees
26th11th
28th
21st
5th
Divisors
255th
259th
50th
Evil Numbers
109th
86th
37th
Fibonacci
343rd
379th146th46th
Fizz Buzz
87th355th
772nd198th147th
Happy Numbers
106th
47th
Leap Years
130th
61st105th46th30th106th
40th
Niven Numbers
39th
Ordinal Numbers
29th
Pascal’s Triangle
33rd
Pernicious Numbers
89th
67th
38th
Prime Numbers
217th
62nd
141st
Prime Numbers (Long)
1st
Quine
112th
Rock-paper-scissors-Spock-lizard
11th
Roman to Arabic
23rd
United States
17th
Van Eck Sequence
10th