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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 12:35:10
%S 1,1,1,1,1,1,7,21,45,89,233,863,3251,15437,73625,393971,2328247,
%T 15894743,120359659,1040197243,9831811849,105976019467
%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1111-0100 pattern in any orientation.
%e Maximal 8 X 8 example
%e .0.0.0.0.0.1.1.0
%e .1.0.0.0.1.1.0.0
%e .1.1.1.1.0.1.0.0
%e .0.1.0.0.0.1.0.0
%e .0.0.1.0.0.0.1.0
%e .0.0.1.0.1.1.1.1
%e .0.0.1.1.0.0.0.1
%e .0.1.1.0.0.0.0.0
%K nonn
%O 1,7
%A _R. H. Hardin_