The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #4 Mar 31 2012 12:35:14
%S 1,1,1,3,1,5,9,25,65,311,777,5163,19629,179101,938309,11522939,
%T 83049733,1385281995,13583413581,310426685067,4145583315227,
%U 129859229238145
%N Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-1110-0111-0010 pattern in any orientation.
%e Maximal 8 X 8 example
%e .0.0.1.0.0.0.1.0
%e .0.1.1.1.0.1.1.1
%e .1.1.1.0.1.1.1.0
%e .0.1.0.0.0.1.0.0
%e .0.0.1.0.0.0.1.0
%e .0.1.1.1.0.1.1.1
%e .1.1.1.0.1.1.1.0
%e .0.1.0.0.0.1.0.0
%K nonn
%O 1,4
%A _R. H. Hardin_, Nov 04 2008