A013385 - OEIS

%I #7 Sep 30 2025 20:34:18

%S 1,0,0,10,-840,60870,-4949780,484684330,-57168678320,7957246947790,

%T -1270811040444460,224172849477365650,-40867049294767840200,

%U 6397467145495026664310,40199264206917072158460

%N cosh(sin(x)-tanh(x))=1+10/6!*x^6-840/8!*x^8+60870/10!*x^10...

%t With[{nn=30},Take[CoefficientList[Series[Cosh[Sin[x]-Tanh[x]],{x,0,nn}],x] Range[0,nn]!,{1,-1,2}]] (* _Harvey P. Dale_, Feb 25 2015 *)

%K sign

%O 0,4

%A _Patrick Demichel_