12 Days of Christmas
673rd
99 Bottles of Beer
82nd
801st
Abundant Numbers
549th
Arrows
199th
Christmas Trees
52nd
Collatz
253rd
Emirp Numbers
521st
Fibonacci
192nd
1,139th
Fizz Buzz
815th
Foo Fizz Buzz Bar
291st
Leap Years
118th
738th
Look and Say
349th
Niven Numbers
731st
Niven Numbers (Long)
360th
Number Spiral
164th
Prime Numbers
117th
753rd
Prime Numbers (Long)
371st
Quine
90th82nd51st327th82nd109th56th56th55th
Tongue-twisters
218th