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Search: id:A085527
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| 1, 3, 25, 343, 6561, 161051, 4826809, 170859375, 6975757441, 322687697779, 16679880978201, 952809757913927, 59604644775390625, 4052555153018976267, 297558232675799463481, 23465261991844685929951, 1977985201462558877934081, 177482997121587371826171875
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OFFSET
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0,2
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COMMENT
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a(n) is the determinant of the zigzag matrix Z(n) (see A088961). - Paul Boddington (psb(AT)maths.warwick.ac.uk), Nov 03 2003
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FORMULA
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E.g.f.: sqrt(2)/(2*(1+LambertW(-2*x))*sqrt(-x/LambertW(-2*x))). - Vladeta Jovovic (vladeta(AT)eunet.rs), Oct 16 2004
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MAPLE
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with(finance):seq(mul(cashflows([n, n, 1], 0), k=1..n), n=0..20); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Dec 22 2008]
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CROSSREFS
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Cf. A088961.
Cf. A062971.
Sequence in context: A143635 A023997 A154961 this_sequence A093360 A161629 A129506
Adjacent sequences: A085524 A085525 A085526 this_sequence A085528 A085529 A085530
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Jul 05 2003
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