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A110225 Expansion of (-1+3*x+2*x^2-8*x^3+3*x^5-2*x^6-2*x^7+x^8)/((x-1)*(x+1)*(x^2-2*x-1)*(x^2+2*x-1)). 0
1, -3, 5, -13, 28, -73, 164, -421, 956, -2449, 5572, -14269, 32476, -83161, 189284, -484693, 1103228, -2824993, 6430084, -16465261, 37477276, -95966569, 218433572, -559334149, 1273124156, -3260038321, 7420311364, -19000895773, 43248744028, -110745336313 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..29.

FORMULA

a(n) = -5*A000129(n+1) +12*A000129(n) -1/2 +(-1)^n/2 +(-1)^n*A000129(n+1), if n>2. [From R. J. Mathar, Nov 10 2009]

PROG

Floretion Algebra Multiplication Program, FAMP Code: 4baseksigcycsumseq[A*B] with A = + 'i + .5'ii' + .5'jj' + .5'kk' + .5e and B = - .25'j + .25'k - .25j' + .25k' - .5'ii' - .25'ij' - .25'ik' - .25'ji' - .25'ki' - .5e; sumtype: (Y[15], *, sum/2)

CROSSREFS

Sequence in context: A160823 A077443 A147196 * A065047 A282565 A290113

Adjacent sequences:  A110222 A110223 A110224 * A110226 A110227 A110228

KEYWORD

easy,sign

AUTHOR

Creighton Dement, Sep 06 2005

STATUS

approved

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Last modified November 22 09:32 EST 2017. Contains 295076 sequences.