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A077906
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Expansion of (1-x)^(-1)/(1+x+2*x^3).
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1
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1, 0, 1, -2, 3, -4, 9, -14, 23, -40, 69, -114, 195, -332, 561, -950, 1615, -2736, 4637, -7866, 13339, -22612, 38345, -65022, 110247, -186936, 316981, -537474, 911347, -1545308, 2620257, -4442950, 7533567, -12774080, 21659981, -36727114, 62275275, -105595236, 179049465, -303600014
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OFFSET
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0,4
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LINKS
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MATHEMATICA
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CoefficientList[Series[(1-x)^(-1)/(1+x+2x^3), {x, 0, 50}], x] (* or *) LinearRecurrence[{0, 1, -2, 2}, {1, 0, 1, -2}, 50] (* Harvey P. Dale, Oct 13 2023 *)
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PROG
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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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