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 1,1,1,1,1,1,1,9,15,29,57,137,413,1389,4485,15371,54209,224739,
%T 1032991,5497929,29140255,171761393,1058704295,7315438183
%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 11110-01111 pattern in any orientation.
%e Maximal 8 X 8 example
%e .1.0.0.0.1.1.1.1
%e .1.1.0.1.1.1.1.0
%e .1.1.0.0.0.0.0.0
%e .1.1.0.0.0.0.1.0
%e .0.1.0.0.0.0.1.1
%e .0.0.0.0.0.0.1.1
%e .0.1.1.1.1.0.1.1
%e .1.1.1.1.0.0.0.1
%K nonn
%O 1,8
%A _R. H. Hardin_