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Use difference to find the pattern in the seqence.

2,9,20,42,82,147,244

Assuming the the pattern continues, the eighth term should be?

 Oct 16, 2018
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The sequence continues as follows:

2, 9, 20, 42, 82, 147, 244, 380, 562, 797, 1092, 1454, 1890, 2407, 3012, 3712, ...etc.

The "closed form" is: a_n = 1/6 (7 n^3 - 30 n^2 + 83 n - 48) (for all terms given.

 Oct 16, 2018

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