the rule is:keep adding double starting from 1
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You first have to figure out some rule for the sequence. This can be quite tricky.
An arithmetic sequence is a group or sequence of numbers where, except for the first number, each of the subsequent number is determined by the same rule or set of rules. * * * * * The above answer is incorrect. The rule can only be additive: it cannot be multiplicative or anything else.
In the study of sequences, given a number n, the position to term rule tells you how the nth term of the sequence is calculated.
It is T(n) = n2 + 4*n + 2.
It is T(n) = n2 - 2n + 6