# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a147177 Showing 1-1 of 1 %I A147177 #4 Mar 31 2012 12:35:15 %S A147177 1,1,1,1,1,5,25,93,439,1973,9767,71707,630927,7316817,94092203, %T A147177 1666775933 %N A147177 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1111-0010-0010 pattern in any orientation. %e A147177 Maximal 8 X 8 example %e A147177 .0.0.1.0.0.0.1.0 %e A147177 .1.1.1.0.1.1.1.0 %e A147177 .0.0.1.0.0.0.1.0 %e A147177 .0.0.1.1.0.0.1.1 %e A147177 .1.1.0.0.1.1.0.0 %e A147177 .0.1.0.0.0.1.0.0 %e A147177 .0.1.1.1.0.1.1.1 %e A147177 .0.1.0.0.0.1.0.0 %K A147177 nonn %O A147177 1,6 %A A147177 _R. H. Hardin_, Nov 04 2008 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE