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A167585
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a(n) = 12*n^2 - 8*n + 9.
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3
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13, 41, 93, 169, 269, 393, 541, 713, 909, 1129, 1373, 1641, 1933, 2249, 2589, 2953, 3341, 3753, 4189, 4649, 5133, 5641, 6173, 6729, 7309, 7913, 8541, 9193, 9869, 10569, 11293, 12041, 12813, 13609, 14429, 15273, 16141, 17033, 17949, 18889
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OFFSET
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1,1
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COMMENTS
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The third row of the ED4 array A167584.
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LINKS
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FORMULA
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GF(z) = (9*z^2 + 2*z + 13)/(1-z)^3.
a(n) = 3*a(n-1) - 3*a(n-2) + a(n-3). - G. C. Greubel, Jun 17 2016
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MATHEMATICA
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LinearRecurrence[{3, -3, 1}, {13, 41, 93}, 100] (* G. C. Greubel, Jun 17 2016 *)
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PROG
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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