# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a147474 Showing 1-1 of 1 %I A147474 #4 Mar 31 2012 12:35:17 %S A147474 1,1,1,1,1,3,11,35,119,483,1553,7807,47813,363745,2696139 %N A147474 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-1111-0100-0100 pattern in any orientation. %e A147474 Maximal 8 X 8 example %e A147474 .0.0.1.0.0.0.1.1 %e A147474 .0.0.1.0.1.1.1.1 %e A147474 .1.1.1.1.0.0.1.0 %e A147474 .0.0.1.1.0.0.1.0 %e A147474 .0.1.0.0.1.1.0.0 %e A147474 .0.1.0.0.1.1.1.1 %e A147474 .1.1.1.1.0.1.0.0 %e A147474 .1.1.0.0.0.1.0.0 %K A147474 nonn %O A147474 1,6 %A A147474 _R. H. Hardin_ # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE