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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

Table of n, a(n) for n=0..43.

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.)