Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #4 Mar 31 2012 12:35:10
%S 1,1,1,1,1,1,1,1,9,9,25,25,125,125,1323,1323,18755,18755,388143,
%T 388143,11998517,11998517,573092271,573092271,41661958269,41661958269,
%U 4471274578309,4471274578309,730746269407465
%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0100-1111-0010 pattern in any orientation.
%e Maximal 9 X 9 example
%e .0.0.0.0.0.0.0.0.0
%e .0.0.1.0.0.0.1.0.0
%e .1.1.1.1.0.1.1.1.1
%e .0.1.0.0.0.0.0.1.0
%e .0.0.0.0.0.0.0.0.0
%e .0.1.0.0.0.0.0.1.0
%e .1.1.1.1.0.1.1.1.1
%e .0.0.1.0.0.0.1.0.0
%e .0.0.0.0.0.0.0.0.0
%K nonn
%O 1,9
%A _R. H. Hardin_