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A368789
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a(n) = (n+1)^2 * (n!)^3 * Sum_{k=1..n} 1/((k+1)^2 * (k!)^3).
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1
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0, 1, 19, 913, 91301, 16434181, 4831649215, 2164578848321, 1402647093712009, 1262382384340808101, 1527482685052377802211, 2419532573122966438702225, 4906812058293375937688112301, 12502557124531521889229310142949
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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(0) = 0; a(n) = (n+1)^2 * n * a(n-1) + 1.
a(n) = A368776(n) - (n+1)^2 * (n!)^3.
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PROG
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(PARI) a(n) = (n+1)^2*n!^3*sum(k=1, n, 1/((k+1)^2*k!^3));
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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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