99 Bottles of Beer
22nd
Abundant Numbers
31st
Arabic to Roman
17th
Christmas Trees
22nd
9th
25th
18th
4th
Divisors
211th
227th
43rd
Evil Numbers
88th
73rd
32nd
Fibonacci
260th
314th
106th
39th
Fizz Buzz
74th
286th
661st
171st
130th
Happy Numbers
88th
39th
Leap Years
103rd
43rd
86th
39th
28th
96th
27th
Niven Numbers
32nd
Ordinal Numbers
26th
Pascalβs Triangle
31st
Pernicious Numbers
65th
55th
28th
Prime Numbers
181st
50th
100th
Prime Numbers (Long)
1st
Quine
93rd
Rock-paper-scissors-Spock-lizard
10th
Roman to Arabic
19th
United States
15th
Van Eck Sequence
8th