Yes, I'm still here. Again, the difference between these numbers has a
simple relationship - it is:

353 x N + N,

where N is the number in the household. I would suggest, therefore,
that your sequence continues 2098, 2452, 2806 etc, and the overall
relationship is:

= 682 + (353 * N) + N

Actually, this is one less than your value for N=1, but the other
values are the same.

Pete