12 Days of Christmas
881st
99 Bottles of Beer
18th
Abundant Numbers
18th
Arrows
12th
Collatz
23rd
Evil Numbers (Long)
466th
Fibonacci
144th
71st
Fizz Buzz
120th171st
78th519th1,341st81st
Niven Numbers (Long)
388th
Odious Numbers
83rd
757th64th117th
Pangram Grep
17th
28th47th
47th204th31st27th532nd59th96th34th28th
Prime Numbers
44th
Quine
126th
769th
π
32nd