Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #3 Mar 31 2012 12:35:08
%S 1,1,1,9,31,205,1307,12227,171281,3266929,85166971,3120438693,
%T 149314103237,10059913232521,894685834014771
%N Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected in a 3X2 elbow 1,1 1,2 1,3 2,3 in any orientation.
%e Maximal 8 X 8 example
%e .0.0.0.1.1.0.1.1
%e .1.0.0.1.0.1.0.1
%e .1.0.0.1.0.1.0.1
%e .1.1.0.0.1.1.0.0
%e .0.0.1.1.0.0.1.1
%e .1.0.1.0.1.0.0.1
%e .1.0.1.0.1.0.0.1
%e .1.1.0.1.1.0.0.0
%K nonn
%O 1,4
%A _R. H. Hardin_, Oct 25 2008