12 Days of Christmas
875th
99 Bottles of Beer
18th
Abundant Numbers
18th
Arrows
12th
Collatz
23rd
Evil Numbers (Long)
459th
Fibonacci
142nd
71st
Fizz Buzz
120th169th
78th513th1,334th81st
Niven Numbers (Long)
382nd
Odious Numbers
82nd
750th63rd117th
Pangram Grep
17th
28th46th
46th203rd31st27th528th61st96th34th27th
Prime Numbers
42nd
Quine
124th
763rd
π
31st