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A010011
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a(0) = 1, a(n) = 21*n^2 + 2 for n>0.
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1
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1, 23, 86, 191, 338, 527, 758, 1031, 1346, 1703, 2102, 2543, 3026, 3551, 4118, 4727, 5378, 6071, 6806, 7583, 8402, 9263, 10166, 11111, 12098, 13127, 14198, 15311, 16466, 17663, 18902, 20183, 21506, 22871, 24278, 25727, 27218, 28751, 30326, 31943, 33602, 35303
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OFFSET
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0,2
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LINKS
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FORMULA
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O.g.f.: 1-x*(23+17*x+2*x^2)/(-1+x)^3. - R. J. Mathar, Apr 12 2008
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MAPLE
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MATHEMATICA
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Join[{1}, LinearRecurrence[{3, -3, 1}, {23, 86, 191}, 50]] (* Vincenzo Librandi, Aug 03 2015 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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