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%I A146045 #3 Mar 31 2012 12:35:09
%S A146045 1,1,1,5,17,49,267,1635,15439,178481,2706563,52897007,1344799359,
%T A146045 42695435337,1933850526571,106233098774339
%N A146045 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 2X4 tee 1,1 1,2 1,3 2,3 1,4 in any orientation.
%e A146045 Maximal 8 X 8 example
%e A146045 .0.0.0.0.1.1.1.1
%e A146045 .0.1.0.0.0.1.0.0
%e A146045 .1.1.1.1.0.0.1.0
%e A146045 .0.0.0.0.1.1.1.1
%e A146045 .1.1.1.1.0.0.0.0
%e A146045 .0.1.0.0.1.1.1.1
%e A146045 .0.0.1.0.0.0.1.0
%e A146045 .1.1.1.1.0.0.0.0
%K A146045 nonn
%O A146045 1,4
%A A146045 _R. H. Hardin_, Oct 26 2008

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