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Search: id:A131589
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| A131589 |
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Expansion of (3+9*x+2*x^2)/((x+1)*(x^2+3*x+1)). |
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+0
1
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| -3, 3, -2, -1, 9, -30, 85, -229, 606, -1593, 4177, -10942, 28653, -75021, 196414, -514225, 1346265, -3524574, 9227461, -24157813, 63245982, -165580137, 433494433, -1134903166, 2971215069, -7778742045, 20365011070, -53316291169, 139583862441, -365435296158, 956722026037
(list; graph; listen)
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OFFSET
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0,1
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FORMULA
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a(n) + a(n+1) = (-1)^(n+1)*A001906(n) = (-1)^(n+1)*F(2n)
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PROGRAM
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Floretion Algebra Multiplication Program, FAMP Code: 2tesforseq[A*B], with A = - .5'j + .5'k - .5j' + .5k' - 'ii' - .5'ij' - .5'ik' - .5'ji' - .5'ki' and B = + .5'ij' + .5'ji'; 1vesforseq(n) = (-1)^(n+1)*2, ForType: 1A
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CROSSREFS
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Cf. A001906.
Sequence in context: A140259 A102905 A020862 this_sequence A064983 A124933 A133884
Adjacent sequences: A131586 A131587 A131588 this_sequence A131590 A131591 A131592
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KEYWORD
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easy,sign
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AUTHOR
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Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Aug 30 2007
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