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A112523 Expansion of x*(1+3*x-4*x^2-5*x^3-4*x^6+4*x^5+3*x^4) / ((4*x^2+1)*(x^2+1)*(x^4-x^2+1)). 2
0, 1, 3, -8, -17, 35, 72, -145, -291, 584, 1169, -2339, -4680, 9361, 18723, -37448, -74897, 149795, 299592, -599185, -1198371, 2396744, 4793489, -9586979, -19173960, 38347921, 76695843, -153391688, -306783377, 613566755, 1227133512, -2454267025, -4908534051, 9817068104 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

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

Index entries for linear recurrences with constant coefficients, signature (0,-4,0,0,0,-1,0,-4).

FORMULA

a(n) = -4*a(n-2) - a(n-6) - 4*a(n-8). - Colin Barker, May 18 2019

PROG

(PARI) Vec(x*(1+3*x-4*x^2-5*x^3-4*x^6+4*x^5+3*x^4)/((4*x^2+1)*(x^2+1)*(x^4-x^2+1))+O(x^99)) \\ Charles R Greathouse IV, Sep 27 2012

CROSSREFS

Cf. A112522.

Sequence in context: A182616 A159217 A052996 * A147419 A106691 A140176

Adjacent sequences:  A112520 A112521 A112522 * A112524 A112525 A112526

KEYWORD

sign,easy,changed

AUTHOR

Creighton Dement, Sep 09 2005

STATUS

approved

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Last modified May 25 22:17 EDT 2019. Contains 323576 sequences. (Running on oeis4.)