99 Bottles of Beer
36th
Abundant Numbers
377th
Divisors
78th
714th
Emirp Numbers
275th
Evil Numbers
1st
Fibonacci
73rd
152nd
Fizz Buzz
95th1,102nd51st
Happy Numbers
537th
Leap Years
18th327th12th
Niven Numbers
428th
Odious Numbers
816th
Ordinal Numbers
Pangram Grep
278th
Pascalβs Triangle
414th
Pernicious Numbers
200th
Prime Numbers
82nd
212th
Quine
56th
Ο
141st
Ο
115th
Ο
201st
β2
279th
π
180th