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 A132765 a(n) = n*(n + 23). 13
 0, 24, 50, 78, 108, 140, 174, 210, 248, 288, 330, 374, 420, 468, 518, 570, 624, 680, 738, 798, 860, 924, 990, 1058, 1128, 1200, 1274, 1350, 1428, 1508, 1590, 1674, 1760, 1848, 1938, 2030, 2124, 2220, 2318, 2418, 2520, 2624, 2730, 2838 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS F. P. Muga II, Extending the Golden Ratio and the Binet-de Moivre Formula, ResearchGate, 2014. Index entries for linear recurrences with constant coefficients, signature (3,-3,1). FORMULA a(n) = n*(n + 23). a(n) = 2*n + a(n-1) + 22 for n>0, a(0)=0. - Vincenzo Librandi, Aug 03 2010 From Chai Wah Wu, Dec 17 2016: (Start) a(n) = 3*a(n-1) - 3*a(n-2) + a(n-3) for n > 2. G.f.: 2*x*(11*x - 12)/(x - 1)^3. (End) MAPLE seq(sum(4*k-n, k=8..n), n=7..50); # Zerinvary Lajos, Feb 17 2008 MATHEMATICA Table[n (n + 23), {n, 0, 50}] (* Bruno Berselli, Sep 03 2018 *) PROG (PARI) a(n)=n*(n+23) \\ Charles R Greathouse IV, Jun 17 2017 CROSSREFS Cf. A002378, A120071, A001477, A056126, A098849, A132760, A132761, A132762, A132763, A132764, A098850, A005563, A028552, A028347, A028557, A028560, A028563, A028566, A028569, A098603, A098847, A132759, A098848. Sequence in context: A042148 A042150 A087355 * A274898 A025137 A070197 Adjacent sequences:  A132762 A132763 A132764 * A132766 A132767 A132768 KEYWORD nonn,easy AUTHOR Omar E. Pol, Aug 28 2007 STATUS approved

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Last modified March 19 00:15 EDT 2019. Contains 321306 sequences. (Running on oeis4.)