Each number has one or two bags, I believe 6, 9, 10, 13 and 14 have two and that 11 and 12 have one. Sadly, I cannot remember the rest and I don't know if I'm certain.
Of course, if you are under the impression that you miss bags with a certain number, you can check that section of the instructions. If you fear it spoils the build, contacting LEGO itself would be the best course of action.