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A364989
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E.g.f. satisfies A(x) = 1 + x*A(x)^4*exp(x*A(x)^4).
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6
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1, 1, 10, 207, 6628, 288885, 15969606, 1070760523, 84448152328, 7660906993737, 785932068816010, 89973000854464431, 11370915080258640204, 1572520778920744136029, 236212754707591898128270, 38299196311415039667233715, 6666717272317556205911393296
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OFFSET
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0,3
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LINKS
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FORMULA
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a(n) = (n!/(4*n+1)) * Sum_{k=0..n} k^(n-k) * binomial(4*n+1,k)/(n-k)!.
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PROG
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(PARI) a(n) = n!*sum(k=0, n, k^(n-k)*binomial(4*n+1, k)/(n-k)!)/(4*n+1);
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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