40

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gonna say 96 (8 + (8 x 11)).

I mean I could be wrong, but that is way over complicating what is going on. The second eqation is its sum plus previous answer (7 + 5). Third is its sum plus previous (9 + 12). So forth is sum plus previous (19 + 21). Nothing accumulative.

You’re probably right.

I had it as first term: 1 + x (x =4), second term = 2+ 2x (x = 5), third term = 3 + 3x (x = 6), 8th term = 8 + 8x, x = 11).

Oddly enough, I kinda saw where you got it from.