Posted by Kate on Monday, July 11, 2011 at 4:59pm.
or
t(n) = t(n-1) + 2n + 3
t(1) = 10
t(2) = t(1) + 4+3 = 10+7 = 17
t(3) = t(2) + 6+3 = 17+9 = 26
t(4) = t(3) + 8+3 = 26+11 = 37
t(5) = t(4) + 10+3 = 37+13 = 40
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