# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a147411 Showing 1-1 of 1 %I A147411 #4 Mar 31 2012 12:35:17 %S A147411 1,1,1,1,1,1,1,5,13,27,43,73,179,423,1083,3071,10101,37829,144853, %T A147411 562367,2218397,9164725,42914033,209532563 %N A147411 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1001-1001-1111 pattern in any orientation. %e A147411 Maximal 8 X 8 example %e A147411 .1.0.0.1.0.1.1.1 %e A147411 .1.0.0.1.0.1.0.0 %e A147411 .1.1.1.1.0.1.0.0 %e A147411 .0.0.0.0.0.1.1.1 %e A147411 .1.1.1.0.0.0.0.0 %e A147411 .0.0.1.0.1.1.1.1 %e A147411 .0.0.1.0.1.0.0.1 %e A147411 .1.1.1.0.1.0.0.1 %K A147411 nonn %O A147411 1,8 %A A147411 _R. H. Hardin_ # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE