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A214446 n*(n^2-2*n-1) 0
-2, -2, 6, 28, 70, 138, 238, 376, 558, 790, 1078, 1428, 1846, 2338, 2910, 3568, 4318, 5166, 6118, 7180, 8358, 9658, 11086, 12648, 14350, 16198, 18198, 20356, 22678, 25170, 27838, 30688, 33726, 36958, 40390, 44028, 47878 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..37.

Index entries for linear recurrences with constant coefficients, signature (4,-6,4,-1).

FORMULA

a(n) = -2*A110427(n). G.f.  2*x*(-1+3*x+x^2) / (x-1)^4 . - R. J. Mathar, Jul 18 2012

PROG

(PARI) a(n) = n*(n^2 - 2*n - 1)  \\ Michel Marcus, Jul 15 2013

CROSSREFS

Sequence in context: A292831 A076726 A032272 * A179320 A004304 A326907

Adjacent sequences:  A214443 A214444 A214445 * A214447 A214448 A214449

KEYWORD

sign,easy

AUTHOR

Marco Piazzalunga, Jul 18 2012

STATUS

approved

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Last modified October 20 20:24 EDT 2019. Contains 328273 sequences. (Running on oeis4.)