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A354064
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Product_{n>=1} 1 / (1 - x^(2*n))^(a(n)/(2*n)!) = cosh(x).
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6
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1, -8, -104, 1408, -354944, 47546368, -6204652544, 68669145088, -47215125069824, 159504062197792768, -51085990673656315904, -6994033618612756938752, -15510963121850795776016384, 14479308135716773591282352128, 7469518701197092988127633473536, 11962377309169877924807975108608
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OFFSET
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1,2
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LINKS
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FORMULA
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E.g.f.: Sum_{k>=1} mu(k) * log(cosh(x^k)) / k (even powers only).
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MATHEMATICA
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nmax = 32; Take[CoefficientList[Series[Sum[MoebiusMu[k] Log[Cosh[x^k]]/k, {k, 1, nmax}], {x, 0, nmax}], x] Range[0, nmax]!, {1, -1, 2}] // Rest
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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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