%I #8 Jun 10 2017 22:34:31
%S 0,12,322,14248,1530196,436619868,343715004510,766012555199052,
%T 4914763477312679808,91781780911712980966236,
%U 5028368533802124263609489682,813124448051069045700905179168520
%N Number of (undirected) paths in the n X n grid graph.
%C Paths of length zero are not counted here. - _Andrew Howroyd_, Jun 10 2017
%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>
%Y Main diagonal of A288518.
%Y Cf. A236753, A288033, A288148, A007764, A121785, A120443.
%K nonn,more
%O 1,2
%A _Eric W. Weisstein_, Jun 04 2017
%E a(6)-a(12) from _Andrew Howroyd_, Jun 10 2017