It's always 3 seats, aisle, 3 seats.
Also the rows are a bit staggered so if you're in an aisle seat, you're not right next to the passenger across the aisle from you. Kind of makes it a PITA for our fam of 4.
We've tried many configurations and find that ds12 window with dh middle seat, then me and ds9 directly behind them works best (or vice versa)
This gives both kids a window and we can easily pass things back and forth and talk when we want to without bothering other passengers.