A147462 - OEIS

A147462

Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-0011 pattern in any orientation.

%I #4 Mar 31 2012 12:35:17

%S 1,1,1,1,1,1,1,1,9,9,25,25,93,93,589,589,6735,6735,107293,107293,

%T 1848191,1848191,45715541,45715541,1702371353,1702371353

%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-0011 pattern in any orientation.

%e Maximal 9 X 9 example

%e .0.0.1.1.0.1.1.0.0

%e .0.1.1.0.0.0.1.1.0

%e .0.0.0.0.0.0.0.0.0

%e .0.1.1.0.0.0.1.1.0

%e .0.0.1.1.0.1.1.0.0

%K nonn

%O 1,9

%A _R. H. Hardin_