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A077863
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Expansion of (1-x)^(-1)/(1-x-2*x^2-2*x^3).
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0
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1, 2, 5, 12, 27, 62, 141, 320, 727, 1650, 3745, 8500, 19291, 43782, 99365, 225512, 511807, 1161562, 2636201, 5982940, 13578467, 30816750, 69939565, 158730000, 360242631, 817581762, 1855527025, 4211175812, 9557393387, 21690799062, 49227937461, 111724322360
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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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MATHEMATICA
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CoefficientList[Series[(1-x)^(-1)/(1-x-2x^2-2x^3), {x, 0, 40}], x] (* or *) LinearRecurrence[{2, 1, 0, -2}, {1, 2, 5, 12}, 40] (* Harvey P. Dale, Sep 14 2016 *)
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PROG
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(PARI) my(x='x+O('x^40)); Vec((1-x)^(-1)/(1-x-2*x^2-2*x^3)) \\ Christian Krause, Jan 02 2023
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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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