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A009274 E.g.f.: exp(tanh(x)/cos(x)). 1

%I #15 Aug 25 2012 14:29:19

%S 1,1,1,2,5,32,157,688,3817,29952,257049,1922560,15886125,160364544,

%T 1844058101,19815696384,218349214545,2743045259264,38729647296945,

%U 538516252917760,7468216325125589,112957538226929664,1882371895493492429

%N E.g.f.: exp(tanh(x)/cos(x)).

%t With[{nn=30},CoefficientList[Series[Exp[Tanh[x]/Cos[x]],{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Aug 25 2012 *)

%o (PARI) for(n=1,#t=Vec(exp(tanh(x)/cos(x))),print1((n-1)!*t[n]",")) \\ - _M. F. Hasler_, Aug 25 2012

%K nonn

%O 0,4

%A _R. H. Hardin_

%E Extended and formatted by _Olivier GĂ©rard_, Mar 15 1997

%E Definition clarified by _Harvey P. Dale_, Aug 25 2012

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Last modified April 25 07:07 EDT 2024. Contains 371964 sequences. (Running on oeis4.)