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A009274
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E.g.f.: exp(tanh(x)/cos(x)).
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1
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1, 1, 1, 2, 5, 32, 157, 688, 3817, 29952, 257049, 1922560, 15886125, 160364544, 1844058101, 19815696384, 218349214545, 2743045259264, 38729647296945, 538516252917760, 7468216325125589, 112957538226929664, 1882371895493492429
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OFFSET
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0,4
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LINKS
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MATHEMATICA
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With[{nn=30}, CoefficientList[Series[Exp[Tanh[x]/Cos[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Aug 25 2012 *)
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PROG
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(PARI) for(n=1, #t=Vec(exp(tanh(x)/cos(x))), print1((n-1)!*t[n]", ")) \\ - M. F. Hasler, Aug 25 2012
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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