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%I #4 Nov 17 2017 04:06:13
%S 1,1,98,4928160
%N Chromatic invariant of the n X n rook graph.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/ChromaticInvariant.html">Chromatic Invariant</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/RookGraph.html">Rook Graph</a>
%K nonn,more
%O 1,3
%A _Eric W. Weisstein_, Nov 16 2017