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Search: id:A110225
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| A110225 |
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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)). |
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+0
1
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| 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; listen)
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OFFSET
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0,2
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FORMULA
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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 (mathar(AT)strw.leidenuniv.nl), Nov 10 2009]
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PROGRAM
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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)
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CROSSREFS
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Sequence in context: A160823 A077443 A147196 this_sequence A065047 A067932 A106666
Adjacent sequences: A110222 A110223 A110224 this_sequence A110226 A110227 A110228
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KEYWORD
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easy,sign,new
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AUTHOR
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Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Sep 06 2005
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