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A261056
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Expansion of ( 2-x^2 ) / (x^2+2*x-1)^2 .
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1
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2, 8, 27, 84, 248, 708, 1973, 5400, 14574, 38896, 102863, 269964, 703972, 1825612, 4711785, 12110064, 31010266, 79148184, 201420163, 511233156, 1294489296, 3270662036, 8247316765, 20758752648, 52163239622, 130875524096, 327893289783, 820410399804, 2050189683644
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OFFSET
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0,1
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COMMENTS
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LINKS
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FORMULA
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MATHEMATICA
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CoefficientList[Series[(2-x^2)/(x^2+2*x-1)^2, {x, 0, 40}], x] (* or *) LinearRecurrence[{4, -2, -4, -1}, {2, 8, 27, 84}, 40] (* Harvey P. Dale, Feb 24 2017 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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