%I #5 Oct 20 2014 18:33:44
%S 1,2,3,29,48,1401,1825,183270,194391,76221979,59133738,86201358557,
%T 54181631319,318503225414986,146475713866791
%N Number of ways of placing kings with no more than 3 mutual attacks on an n X n chessboard symmetric under horizontal reflection.
%K nonn,more,hard
%O 0,2
%A _R. H. Hardin_, Sep 04 2008