%I #3 Mar 31 2012 12:35:09
%S 1,1,1,1,3,1,10,10,43,65,310,319,2668,3017,34910,54223,689528,1137739,
%T 18655423,31210424,700220638,1365782613,38696080322,86209219516,
%U 3066770236798,7328473794260,340900040830525,897917903090606
%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only either as two by three or three by two blocks.
%e Maximal 8 X 8 example
%e .1.1.0.1.1.0.1.1
%e .1.1.0.1.1.0.1.1
%e .1.1.0.1.1.0.1.1
%e .0.0.0.0.0.0.0.0
%e .0.0.0.0.0.0.0.0
%e .1.1.0.1.1.0.1.1
%e .1.1.0.1.1.0.1.1
%e .1.1.0.1.1.0.1.1
%K nonn
%O 1,5
%A _R. H. Hardin_, Oct 27 2008
|