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A050408 a(n)=117*n^2/2-99*n/2+1. 1
1, 10, 136, 379, 739, 1216, 1810, 2521, 3349, 4294, 5356, 6535, 7831, 9244, 10774, 12421, 14185, 16066, 18064, 20179, 22411, 24760, 27226, 29809, 32509, 35326, 38260, 41311, 44479, 47764, 51166, 54685, 58321, 62074, 65944, 69931, 74035 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..10000

Index entries for linear recurrences with constant coefficients, signature (3,-3,1).

FORMULA

G.f. ( -1-7*x-109*x^2 ) / (x-1)^3 . - R. J. Mathar, Jul 01 2011

PROG

(MAGMA) [117*n^2/2-99*n/2+1: n in [0..45]]; // Vincenzo Librandi, Jul 05 2011

(PARI) a(n)=117*n^2/2-99*n/2+1 \\ Charles R Greathouse IV, Jun 16 2017

CROSSREFS

Sequence in context: A232265 A095653 A024135 * A133197 A287473 A240917

Adjacent sequences:  A050405 A050406 A050407 * A050409 A050410 A050411

KEYWORD

easy,nonn

AUTHOR

Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Dec 22 1999

STATUS

approved

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Last modified January 18 20:19 EST 2018. Contains 297865 sequences.