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A119577
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(n+n^2+n^3)*(binomial(2*n,n))/2.
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0
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0, 3, 42, 390, 2940, 19530, 119196, 684684, 3758040, 19909890, 102539580, 516023508, 2547314952, 12371513700, 59252218200, 280374917400, 1312759571760, 6089545431090, 28014942671100, 127932182324100
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OFFSET
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0,2
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LINKS
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MAPLE
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[seq ((n+n^2+n^3)*(binomial(2*n, n))/2, n=0..29)];
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MATHEMATICA
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Table[(n+n^2+n^3) Binomial[2n, n]/2, {n, 0, 20}] (* Harvey P. Dale, May 26 2020 *)
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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