|
%I #4 Mar 31 2012 12:35:09
%S 1,1,3,5,9,19,71,265,1031,4533,26975,188011,1487007,13567107,
%T 149156483,1938922129,29541083501,528608677059,11174794559755,
%U 278126836279869,8142808516685673,280747197308433325,11410125160644854247
%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 110-111-011 pattern in any orientation.
%e Maximal 8 X 8 example
%e .0.1.1.0.0.1.1.0
%e .1.1.1.0.0.1.1.1
%e .1.1.0.1.1.0.1.1
%e .0.0.1.1.1.0.0.0
%e .0.0.1.1.0.0.0.0
%e .1.1.0.0.0.1.1.0
%e .1.1.1.0.0.1.1.1
%e .0.1.1.0.0.0.1.1
%K nonn
%O 1,3
%A _R. H. Hardin_
|
