Oops... I just realized that there was a typo, there isn't supposed to be a 7 at the end. Sorry. But I think if anyone had been about to solve it it wouldn't have thrown you off, you would have just figured it was a typo.
Anyway apokalipse, the answer is a little more... obvious, for lack of a better word. The sequence of the numbers is very important. Here's a hint to make up for the typo 7: think less about their values and more about other properties they might have.