(n(n-1) divided by 2 + 1) multiplied by 3) +6
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There is no pattern
12, 8
tn = 3n or 3*3* ... *3 (where there are n threes.)
after -9 it is -15 then -21, -27 and the ninth is -36
To find the nth term of this sequence, we first need to determine the pattern or rule governing the sequence. By examining the differences between consecutive terms, we can see that the sequence is increasing by 9, 15, 21, 27, and so on. This indicates that the nth term is given by the formula n^2 + 1.