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A009156 Expansion of e.g.f.: cosh(tan(log(1+x))). 0

%I

%S 1,0,1,-3,20,-140,1216,-12096,137080,-1737504,24368656,-374527120,

%T 6259083896,-112992788688,2191121957480,-45420491782680,

%U 1002232901602496,-23453004823018496,580102806342112960

%N Expansion of e.g.f.: cosh(tan(log(1+x))).

%t With[{nn=20},CoefficientList[Series[Cosh[Tan[Log[1+x]]],{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Dec 15 2014 *)

%K sign,easy

%O 0,4

%A _R. H. Hardin_

%E Extended with signs by _Olivier GĂ©rard_, Mar 15 1997

%E Definition clarified and prior Mathematica program replaced by _Harvey P. Dale_, Dec 15 2014

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Last modified June 4 01:32 EDT 2020. Contains 334809 sequences. (Running on oeis4.)