A013291 - OEIS

%I #6 May 07 2022 11:52:48

%S 1,0,0,0,3,-40,250,-1008,6517,-87120,981924,-9387840,103808727,

%T -1434810936,20930063102,-308368386480,4838631496873,-82524970065824,

%U 1497919608463368,-28494789851849472,568078461069883755

%N Expansion of e.g.f.: cosh(log(x+1)-tanh(x))=1+3/4!*x^4-40/5!*x^5+250/6!*x^6-1008/7!*x^7...

%t With[{nn=20},CoefficientList[Series[Cosh[Log[x+1]-Tanh[x]],{x,0,nn}],x] Range[ 0,nn]!] (* _Harvey P. Dale_, May 07 2022 *)

%K sign

%O 0,5

%A Patrick Demichel (patrick.demichel(AT)hp.com)

%E Definition clarified by _Harvey P. Dale_, May 07 2022