What number comes next in the sequence 3 9 4 16 11?

Oh, dude, it's like a math puzzle or something. So, if we look at the pattern, it's like adding 6, then subtracting 5, then adding 12, then subtracting 5 again. So, the next number would be adding 6, which gives us 17. But hey, who really cares about patterns, right?