%I #12 Apr 02 2017 15:29:59
%S 0,1,-4,36,-512,9360,-225600,6935488,-258670592,11453942016,
%T -595273139200,35778886145024,-2452254890065920,189732604997505024,
%U -16441271556334370816,1583926386391039918080,-168491094250200804360192
%N Expansion of sin(sin(x))*x/2.
%H Harvey P. Dale, <a href="/A024253/b024253.txt">Table of n, a(n) for n = 0..100</a>
%t With[{nn=40},Take[CoefficientList[Series[Sin[Sin[x]]x/2,{x,0,nn}],x] Range[0,nn]!,{1,-1,2}]] (* _Harvey P. Dale_, Oct 04 2011 *)
%Y Cf. A009478.
%K sign
%O 0,3
%A _R. H. Hardin_
%E Extended with signs Mar 1997