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A293532
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E.g.f.: exp(x/(x^2 - 1)).
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5
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1, -1, 1, -7, 25, -181, 1201, -10291, 97777, -1013545, 12202561, -151573951, 2173233481, -31758579997, 524057015665, -8838296029291, 164416415570401, -3145357419120721, 65057767274601217, -1391243470549894135, 31671795881695430521, -747996624368605997701
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OFFSET
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0,4
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LINKS
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FORMULA
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E.g.f.: Product_{k>=1} 1/(1 + x^k)^(phi(k)/k), where phi() is the Euler totient function (A000010). - Ilya Gutkovskiy, May 25 2019
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MATHEMATICA
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CoefficientList[Series[E^(x/(x^2 - 1)), {x, 0, 20}], x] * Range[0, 20]! (* Vaclav Kotesovec, Oct 12 2017 *)
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PROG
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(PARI) N=66; x='x+O('x^N); Vec(serlaplace(exp(x/(x^2-1))))
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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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