%I #9 Apr 09 2014 11:03:44
%S 0,1,63,15703,58520309,4160751709140,6537540397103648498
%N Numbers of undirected cycles in the n-triangular graph.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/GraphCycle.html">Graph Cycle</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/TriangularGraph.html">Triangular Graph</a>
%K nonn,more
%O 2,3
%A _Eric W. Weisstein_, Dec 28 2013
%E a(7)-a(8) from _Eric W. Weisstein_, Apr 09 2014