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A027317
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a(n) = Sum_{k=0..m-2} T(n,k) * T(n,k+2), where m=n for n=0,1,2,3; m=2n for n >= 4; and T is given by A026082.
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0
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1, 6, 71, 561, 4797, 41462, 359530, 3124752, 27213084, 237432807, 2075064759, 18162872365, 159198909233, 1397157808149, 12275908402205, 107974903916703, 950639462501475, 8377212510209165, 73882962176311701, 652114141845864819, 5759883148706408695
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OFFSET
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2,2
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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