99 Bottles of Beer
22nd
Abundant Numbers
31st
Arabic to Roman
17th
Christmas Trees
22nd
9th
25th
18th
4th
Divisors
212th
227th
43rd
Evil Numbers
89th
74th
32nd
Fibonacci
265th
316th
108th
39th
Fizz Buzz
74th
288th
666th
171st
130th
Happy Numbers
89th
40th
Leap Years
104th
43rd
87th
39th
28th
96th
27th
Niven Numbers
32nd
Ordinal Numbers
26th
Pascalβs Triangle
32nd
Pernicious Numbers
67th
55th
28th
Prime Numbers
182nd
50th
101st
Prime Numbers (Long)
1st
Quine
94th
Rock-paper-scissors-Spock-lizard
10th
Roman to Arabic
19th
United States
15th
Van Eck Sequence
8th