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A016778 (3n+1)^2. 4
1, 16, 49, 100, 169, 256, 361, 484, 625, 784, 961, 1156, 1369, 1600, 1849, 2116, 2401, 2704, 3025, 3364, 3721, 4096, 4489, 4900, 5329, 5776, 6241, 6724, 7225, 7744, 8281, 8836, 9409, 10000, 10609, 11236 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

FORMULA

a(n)=a(n-1)+3*(6*n-1)  (with a(0)=1) [From Vincenzo Librandi, Nov 20 2010]

CROSSREFS

Sequence in context: A165117 A041496 A059207 * A009952 A105823 A112630

Adjacent sequences:  A016775 A016776 A016777 * A016779 A016780 A016781

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 17 09:17 EST 2012. Contains 206009 sequences.