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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1110-0111-0001 pattern in any orientation.
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%I #4 Mar 31 2012 12:35:17

%S 1,1,1,1,1,1,1,1,63,111,801,1619,12671,27823,349917,870983,40498015,

%T 122215163,11398125347,41676149367,3782723396203,16295789305103,

%U 1930244576207107,9658343102457355

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1110-0111-0001 pattern in any orientation.

%e Maximal 9 X 9 example

%e .0.0.0.1.0.1.0.0.0

%e .0.1.1.1.0.1.1.1.0

%e .1.1.1.0.0.0.1.1.1

%e .1.0.0.0.0.0.0.0.1

%e .0.0.0.0.0.0.0.0.0

%e .0.0.0.1.0.1.0.0.0

%e .0.1.1.1.0.1.1.1.0

%e .1.1.1.0.0.0.1.1.1

%e .1.0.0.0.0.0.0.0.1

%K nonn

%O 1,9

%A _R. H. Hardin_