99 Bottles of Beer
25th
Abundant Numbers
34th
Arabic to Roman
19th
Christmas Trees
26th11th
28th
21st
5th
Divisors
255th
259th
50th
Evil Numbers
109th
86th
37th
Fibonacci
343rd
378th146th46th
Fizz Buzz
86th353rd
771st198th147th
Happy Numbers
105th
46th
Leap Years
130th
61st105th46th30th105th
32nd
Niven Numbers
38th
Ordinal Numbers
29th
Pascal’s Triangle
33rd
Pernicious Numbers
88th
66th
37th
Prime Numbers
217th
62nd
138th
Prime Numbers (Long)
1st
Quine
112th
Rock-paper-scissors-Spock-lizard
10th
Roman to Arabic
23rd
United States
17th
Van Eck Sequence
10th