%I #10 Sep 07 2023 16:11:21
%S 1,1,1,1,1,1,5,19,39,83,233,711,2313,8511,40097,191977,1081845,
%T 6288993,41547129,292524045,2387601825,20697818111
%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1000-1111 pattern in any orientation.
%e Maximal 8 X 8 example:
%e .1.0.0.0.0.1.1.1
%e .1.0.0.0.0.1.0.0
%e .1.1.1.1.0.1.0.0
%e .0.0.0.0.0.1.0.0
%e .0.0.1.0.0.0.0.0
%e .0.0.1.0.1.1.1.1
%e .0.0.1.0.0.0.0.1
%e .1.1.1.0.0.0.0.1
%K nonn,more
%O 1,7
%A _R. H. Hardin_, Nov 04 2008