2..3...4...5...6.. What Comes Next?

8 7 10 11 13. 13256 is 5 numbers, in a combination.

4646564

4.384615385

http://www.research.att.com/~njas/sequences/A093095

First, it is going by ones: 1 2 3 4 5 6. Next it goes by 2's. 2 4 6 8. Finally it goes by 's. 6 9, next would be 12, 15.