Find the rules 1,2,3,6,5,10, (), (), () Why, big brothers and sisters

Find the rules 1,2,3,6,5,10, (), (), () Why, big brothers and sisters

1,2,3,6,5,10,( 7),( 14),(9 )
Rule: there are 1,3,5,7 every other one; (the first term is 1, the tolerance is 2 of the arithmetic sequence);
2,6,10,14 (the first item is 2 and the tolerance is 4)