# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a024301 Showing 1-1 of 1 %I A024301 #14 Aug 25 2012 03:53:51 %S A024301 0,1,0,-16,-992,-59008,-4264960,-377357440,-39934410752, %T A024301 -4874528317440,-648133739913216,-82576764673884160, %U A024301 -4996506942853611520,3557436402223979200512,2987583282428346311376896 %N A024301 E.g.f.: sin(x)*sin(tan(x))/2 (even powers only). %t A024301 With[{nn=30},Take[CoefficientList[Series[Sin[x]Sin[Tan[x]]/2,{x,0,nn}],x] Range[0,nn]!,{1,-1,2}]] (* _Harvey P. Dale_, Aug 24 2012 *) %Y A024301 A009548. %K A024301 sign,easy %O A024301 0,4 %A A024301 _R. H. Hardin_ %E A024301 Definition clarified by _Harvey P. Dale_, Aug 24 2012 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE