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 A132768 a(n) = n*(n + 26). 5
 0, 27, 56, 87, 120, 155, 192, 231, 272, 315, 360, 407, 456, 507, 560, 615, 672, 731, 792, 855, 920, 987, 1056, 1127, 1200, 1275, 1352, 1431, 1512, 1595, 1680, 1767, 1856, 1947, 2040, 2135, 2232, 2331, 2432, 2535, 2640, 2747, 2856, 2967 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 REFERENCES F. P. Muga II, Extending the Golden Ratio and the Binet-de Moivre Formula, March 2014; Preprint on ResearchGate. LINKS Index entries for linear recurrences with constant coefficients, signature (3,-3,1). FORMULA a(n) = n*(n + 26). a(n) = 2*n + a(n-1) + 25, with a(0)=0. - Vincenzo Librandi, Aug 03 2010 MATHEMATICA s=0; lst={}; Do[s+=n; AppendTo[lst, s], {n, 27, 6!, 2}]; lst (* Vladimir Joseph Stephan Orlovsky, Feb 26 2009 *) Table[n(n+26), {n, 0, 50}] (* or *) LinearRecurrence[{3, -3, 1}, {0, 27, 56}, 50] (* Harvey P. Dale, Dec 15 2018 *) PROG (PARI) a(n)=n*(n+26) \\ Charles R Greathouse IV, Jun 17 2017 CROSSREFS Cf. A002378, A120071, A132760, A132761, A132762, A132763, A132764, A132765, A132766, A132767, A098849, A098850, A005563, A028552, A028347, A028557, A028560, A028563, A028566, A028569, A098603, A098847, A132759, A098848. Sequence in context: A042452 A042454 A042456 * A053180 A080864 A260440 Adjacent sequences:  A132765 A132766 A132767 * A132769 A132770 A132771 KEYWORD nonn,easy AUTHOR Omar E. Pol, Aug 28 2007 STATUS approved

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Last modified July 21 02:02 EDT 2019. Contains 325189 sequences. (Running on oeis4.)