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%I #5 Oct 20 2014 18:39:04
%S 1,2,3,19,62,785,3961,92618,796423,31554358,442143014
%N Number of ways of placing kings with no more than 4 mutual attacks on an n X n chessboard symmetric under 180 degree rotation.
%K nonn,more,hard
%O 0,2
%A _R. H. Hardin_, Sep 04 2008
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