# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a146039 Showing 1-1 of 1 %I A146039 #3 Mar 31 2012 12:35:08 %S A146039 1,1,1,1,9,13,45,103,3815,10121,444625,1564307,156192449,708716121, %T A146039 155685558737,926098788583,445436128809681,3444294518750191, %U A146039 3885959472155218673,39161185591962243237,94947827514803095335545 %N A146039 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 2X4 tee 1,1 1,2 1,3 2,3 1,4 in any orientation. %e A146039 Maximal 8 X 8 example %e A146039 .1.0.0.0.0.0.0.1 %e A146039 .1.1.0.0.0.0.1.1 %e A146039 .1.0.0.0.0.0.0.1 %e A146039 .1.0.0.0.0.0.0.1 %e A146039 .0.0.1.0.0.1.0.0 %e A146039 .0.0.1.0.0.1.0.0 %e A146039 .0.1.1.0.0.1.1.0 %e A146039 .0.0.1.0.0.1.0.0 %K A146039 nonn %O A146039 1,5 %A A146039 _R. H. Hardin_, Oct 26 2008 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE