Collatz
Divisors
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Leap Years
3,734th3,617th2,759th2,223rd2,647th3,620th2,539th3,572nd3,588th3,753rd2,200th1,713th2,502nd3,413th3,322nd3,284th3,250th2,705th3,770th2,924th3,648th2,233rd2,970th2,912th3,715th