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A361096
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E.g.f. satisfies A(x) = exp( 1/(1 - x/A(x)^2) - 1 ).
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6
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1, 1, -1, 1, 17, -339, 4999, -63587, 566145, 3549241, -405637489, 15518099961, -446235202799, 9617693853925, -75522664207017, -7341781870733099, 596513949276803969, -30104875035438797583, 1144712508931072057375, -27381639204739332379151
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OFFSET
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0,5
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LINKS
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FORMULA
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a(n) = n! * Sum_{k=0..n} (-2*n+1)^(k-1) * binomial(n-1,n-k)/k!.
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PROG
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(PARI) a(n) = n!*sum(k=0, n, (-2*n+1)^(k-1)*binomial(n-1, n-k)/k!);
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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STATUS
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approved
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