# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a147512 Showing 1-1 of 1 %I A147512 #4 Mar 31 2012 12:35:17 %S A147512 1,1,1,1,5,9,25,59,279,1153,8111,46003,371173,2930355,33533835, %T A147512 383283501 %N A147512 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 11110-01111 pattern in any orientation. %e A147512 Maximal 8 X 8 example %e A147512 .1.1.1.1.0.0.0.1 %e A147512 .0.1.1.1.1.0.1.1 %e A147512 .0.0.0.0.0.0.1.1 %e A147512 .0.1.0.0.0.0.1.1 %e A147512 .1.1.0.0.0.0.1.0 %e A147512 .1.1.0.0.0.0.0.0 %e A147512 .1.1.0.1.1.1.1.0 %e A147512 .1.0.0.0.1.1.1.1 %K A147512 nonn %O A147512 1,5 %A A147512 _R. H. Hardin_ # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE