99 Bottles of Beer
Emirp Numbers
Fizz Buzz
Kolakoski Constant
Leap Years
Pernicious Numbers
Quine
Smith Numbers
Tongue-twisters
π
10th
98th
57th
41st
12th
26th
27th
25th
45th
71st
168th
96th
27th
43rd
63rd
37th
25th
59th
53rd
60th
29th
386th
55th
88th
47th
35th
9th
25th
6th
17th