%I A055544
%S A055544 1,2,6,16,45,120,336,920,2574,7190,20262,57192,162318,461622,1317165,
%T A055544 3766096,10792399,30980862,89084844,256524560,739658472,2135213982,
%U A055544 6170505665,17849399616,51679366125,149750549260,434260826883
%N A055544 Total number of nodes in all rooted trees with n nodes.
%H A055544 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               GraphVertex.html">Link to a section of The World of Mathematics.</
               a>
%H A055544 <a href="Sindx_Ro.html#rooted">Index entries for sequences related to 
               rooted trees</a>
%H A055544 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               GraphEdge.html">Graph Edge</a>
%F A055544 a(n) = n*A000081(n).
%Y A055544 Cf. A000081, A000169, A055543, A055544.
%Y A055544 Sequence in context: A026134 A105696 A074413 this_sequence A126285 A026163 
               A005717
%Y A055544 Adjacent sequences: A055541 A055542 A055543 this_sequence A055545 A055546 
               A055547
%K A055544 nonn
%O A055544 1,2
%A A055544 Eric Weisstein (eric(AT)weisstein.com)