%I #4 Mar 30 2012 17:21:02
%S 1,1,1,2,6,21,112,853,11117,261080,3181,6903,16029,37762,60698,136522,
%T 295370,617884,1031444,2148844,4278884,8230174,13901726,27183550,
%U 50879126,92491135,155765543,289049521,515807289,899791226,1498906514,2663076114,4575392562,7727941845,12683646957,21727344375,36188012919,59514326840,96079635752,159569603160
%N Number of 5-indecomposable (connected) graphs on n nodes.
%C See A124593 for definition.
%F G.f.: x/((1-x)*(1-x^2)^2*(1-x^3)^8*(1-x^4)^44) + 1 - x^3 - 5*x^4 - 37*x^5 + 38*x^6 + 651*x^7 + 10539*x^8 + 259303*x^9 + 548*x^10 + 416*x^11 + 286*x^12.
%Y Cf. A126099, A128526, A128528
%K nonn
%O 1,4
%A _David Applegate_ and _N. J. A. Sloane_, Mar 07 2007