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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #4 Mar 31 2012 12:35:17
%S 1,1,1,1,15,5,49,17,271,61,18529,4397,509931,142159,26069792
%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 10101-11111 pattern in any orientation.
%e Maximal 8 X 8 example
%e .0.0.0.0.0.0.0.0
%e .0.0.0.0.0.0.0.0
%e .0.0.0.0.0.0.0.0
%e .0.1.1.0.0.1.1.0
%e .0.0.1.0.0.1.0.0
%e .0.1.1.0.0.1.1.0
%e .0.0.1.0.0.1.0.0
%e .0.1.1.0.0.1.1.0
%K nonn
%O 1,5
%A _R. H. Hardin_