An Up and Down Series 00,50,33,25 . .

I won't provide a hint this time. This one is OEIS-proof (similar to waterproof :D) too. Twenty terms and guess its logic only.

00,50,33,25,20,16,14,12,11,10,90,83,76,71,66,62,58,55,52,50

• Is it important that it's 09 and not just 9? – Engineer Toast May 1 '15 at 15:10
• @EngineerToast mistyped. it's 90 – RE60K May 1 '15 at 15:11
• @EngineerToast edited. – RE60K May 1 '15 at 15:14
• OK, good. I imagine you wanted it to be harder but not that hard. – Engineer Toast May 1 '15 at 15:15
• Too easy IMO. 50, 33, 25, 20 is a dead giveaway. – Rand al'Thor May 1 '15 at 15:45