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A279231 Expansion of 1/((1-x)^2*(1-3*x+3*x^2)). 2
1, 5, 15, 34, 62, 90, 91, 11, -231, -716, -1444, -2172, -2171, 17, 6579, 19702, 39386, 59070, 59071, 23, -177123, -531416, -1062856, -1594296, -1594295, 29, 4782999, 14348938, 28697846, 43046754, 43046755, 35, -129140127, -387420452, -774840940, -1162261428 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Colin Barker, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (5,-10,9,-3).

FORMULA

a(n) = 5*a(n-1) - 10*a(n-2) + 9*a(n-3) - 3*a(n-4) for n>3.

a(n) = 3*a(n-1) - 3*a(n-2) + n + 1, with a(-1) = a(-2) = 0.

PROG

(PARI) Vec(1/((1-x)^2*(1-3*x+3*x^2)) + O(x^30)) \\ Colin Barker, Dec 08 2016

CROSSREFS

Cf. A001477, A045618, A077859.

Sequence in context: A055004 A147264 A147150 * A238340 A162513 A006003

Adjacent sequences:  A279228 A279229 A279230 * A279232 A279233 A279234

KEYWORD

sign,easy

AUTHOR

Philippe Deléham, Dec 08 2016

EXTENSIONS

Incorrect term corrected by Colin Barker, Dec 09 2016

STATUS

approved

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Last modified February 19 18:22 EST 2019. Contains 320327 sequences. (Running on oeis4.)