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One of the infinitely many possible rules for the nth term of the sequence is t(n) = 4n - 1
Strangely enough, it is 9n + 1 for n = 1, 2, 3, ...
7 - 4n where n denotes the nth term and n starting with 0
The nth term of the sequence is 3n-8 and so the 30th term is 3*30 -8 = 82
The nth term is: 5-2n