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A110684
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Expansion of (-1-8*x-12*x^2-4*x^3+4*x^4) / ((x-1)*(3*x^2+3*x+1)*(2*x^3+2*x^2+4*x+1)).
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4
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1, 2, -10, 41, -148, 530, -1885, 6734, -24142, 86765, -312160, 1123478, -4043605, 14553002, -52373938, 188479877, -678279820, 2440905218, -8784007861, 31610747846, -113756727046, 409373349485, -1473201380488, 5301572336126, -19078633636789
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = -6*a(n-1) - 10*a(n-2) - 3*a(n-3) + 8*a(n-4) + 6*a(n-5) + 6*a(n-6) for n>5. - Colin Barker, May 19 2019
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MAPLE
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seriestolist(series((-1-8*x-12*x^2-4*x^3+4*x^4)/((x-1)*(3*x^2+3*x+1)*(2*x^3+2*x^2+4*x+1)), x=0, 25)); -or- Floretion Algebra Multiplication Program, FAMP Code: tessum(infty)-4kbaseforsumseq[ + 'i - .25'j + .25'k - .25j' + .25k' - .5'ii' - .25'ij' - .25'ik' - .25'ji' - .25'ki' - .5e], Sumtype is set to: sum[Y[15]] = sum[ * ], Fortype is set to: 1A.
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MATHEMATICA
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CoefficientList[Series[(-1 - 8*x - 12*x^2 - 4*x^3 + 4*x^4)/((x - 1)*(3*x^2 + 3*x + 1)*(2*x^3 + 2*x^2 + 4*x + 1)), {x, 0, 50}], x] (* G. C. Greubel, Sep 06 2017 *)
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PROG
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(PARI) Vec((-1-8*x-12*x^2-4*x^3+4*x^4)/((x-1)*(3*x^2+3*x+1)*(2*x^3+2*x^2+4*x+1))+O(x^99)) \\ Charles R Greathouse IV, Sep 26 2012
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CROSSREFS
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KEYWORD
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sign,easy
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AUTHOR
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STATUS
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approved
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