%I #10 Mar 30 2012 17:35:12
%S 1,3,384,2048000,518400000000,7192939211224252416,
%T 6266608900058816862941609984,388040545518272905743826242144898646016,
%U 1911283738799704422875920401026220178381209600000000
%N Numbers of spanning trees of the triangular graphs.
%C Triangular graphs are defined for n>=2.
%H Alois P. Heinz, <a href="/A193154/b193154.txt">Table of n, a(n) for n = 2..20</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/SpanningTree.html">Spanning Tree</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/TriangularGraph.html">Triangular Graph</a>
%K nonn
%O 2,2
%A _Eric W. Weisstein_, Jul 16 2011