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A078048
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Expansion of (1-x)/(1+x+2*x^2-2*x^3).
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0
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1, -2, 0, 6, -10, -2, 34, -50, -22, 190, -246, -178, 1050, -1186, -1270, 5742, -5574, -8450, 31082, -25330, -53734, 166558, -109750, -330834, 883450, -441282, -1987286, 4636750, -1544742, -11703330, 24066314, -3749138, -67790150, 123421054, 4660970, -387083378, 624603546
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| a(0)=1, a(1)=-2, a(2)=0, a(n)=a(n-1)-2*a(n-2)+2*a(n-3) [From Harvey P. Dale, Dec 11 2011]
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MATHEMATICA
| CoefficientList[Series[(1-x)/(1+x+2x^2-2x^3), {x, 0, 40}], x] (* or *) LinearRecurrence[{-1, -2, 2}, {1, -2, 0}, 40] (* From Harvey P. Dale, Dec 11 2011 *)
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CROSSREFS
| Sequence in context: A175478 A011123 A087464 * A110667 A129877 A171734
Adjacent sequences: A078045 A078046 A078047 * A078049 A078050 A078051
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KEYWORD
| sign
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Nov 17 2002
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