A147463 - OEIS

A147463

Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-1111-0011 pattern in any orientation.

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

%S 1,1,1,1,1,3,9,19,45,171,795,4151,23359,160489,1338097,13206661,

%T 152301919,2072243263,33494417573,640878789973,14468834259627,

%U 385605211468773,12154715457880649,453340950276092835

%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-1111-0011 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.0.0.0.0

%e .0.0.0.0.0.0.1.1

%e .0.0.0.0.0.1.1.0

%e .0.0.0.1.1.0.0.0

%e .0.1.1.1.1.0.0.0

%e .0.1.1.0.0.0.0.0

%K nonn

%O 1,6

%A _R. H. Hardin_