%I #7 Sep 09 2017 10:45:28
%S 0,444,550674681
%N Number of (undirected) paths in the n X n X n grid graph.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/GraphPath.html">Graph Path</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/GridGraph.html">Grid Graph</a>
%K nonn,more,bref
%O 1,2
%A _Eric W. Weisstein_, Sep 09 2017