%I #6 Dec 11 2017 12:05:09
%S 1,0,0,2,0,0,40,450,0,2240,108000,1786050,246400,30888000,1647734400,
%T 36567781250,11531520000,1356752592000,85195294912000,
%U 2380490964101250,1210714801920000,153377369153840000
%N Expansion of e.g.f.: exp(arcsin(x)-arcsinh(x))=1+2/3!*x^3+40/6!*x^6+450/7!*x^7+2240/9!*x^9...
%t With[{nn=30},CoefficientList[Series[Exp[ArcSin[x]-ArcSinh[x]],{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Dec 11 2017 *)
%K nonn
%O 0,4
%A Patrick Demichel (patrick.demichel(AT)hp.com)
%E Definition clarified by _Harvey P. Dale_, Dec 11 2017