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A077881
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Expansion of (1-x)^(-1)/(1-2*x^2+2*x^3).
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0
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1, 1, 3, 1, 5, -3, 9, -15, 25, -47, 81, -143, 257, -447, 801, -1407, 2497, -4415, 7809, -13823, 24449, -43263, 76545, -135423, 239617, -423935, 750081, -1327103, 2348033, -4154367, 7350273, -13004799, 23009281, -40710143, 72028161, -127438847, 225476609, -398934015, 705830913
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OFFSET
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0,3
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LINKS
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MATHEMATICA
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CoefficientList[Series[(1-x)^(-1)/(1-2x^2+2x^3), {x, 0, 40}], x] (* or *) LinearRecurrence[{1, 2, -4, 2}, {1, 1, 3, 1}, 40] (* Harvey P. Dale, Apr 16 2022 *)
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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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