7,3,7,5,8,4,9,6, etc

I used ever other number in the sequence for a solution. Starting with the first 1 (1,2,3,4,4,5,6,7,7,8,9) Every fourth number repeats in the sequence.

Starting with the second 1 (1,1,2,1,3,2,4,3,5,4,6) Here each number repeats itslelf after going up by one (don't know how to word this explanation lol. Hope you still understand it.)

It seemed a little too easy so there might be another way to get the numbers??

Raika ^^