cp's OEIS Frontend

A147454 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11000-01111-11000 pattern in any orientation.

%I A147454 #4 Mar 31 2012 12:35:17
%S A147454 1,1,1,1,1,1,1,1,1,1,30,13,224,49,2000,233,18098,1439,209069,14021,
%T A147454 3920160,187331,110361488,3462054
%N A147454 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11000-01111-11000 pattern in any orientation.
%e A147454 Maximal 11 X 11 example
%e A147454 .0.0.1.0.1.0.1.0.1.0.0
%e A147454 .0.0.1.0.1.1.1.0.1.0.0
%e A147454 .0.0.1.0.0.1.0.0.1.0.0
%e A147454 .0.1.1.1.0.1.0.1.1.1.0
%e A147454 .0.1.0.1.0.1.0.1.0.1.0
%e A147454 .0.0.0.0.0.0.0.0.0.0.0
%e A147454 .0.1.0.1.0.1.0.1.0.1.0
%e A147454 .0.1.1.1.0.1.0.1.1.1.0
%e A147454 .0.0.1.0.0.1.0.0.1.0.0
%e A147454 .0.0.1.0.1.1.1.0.1.0.0
%e A147454 .0.0.1.0.1.0.1.0.1.0.0
%K A147454 nonn
%O A147454 1,11
%A A147454 _R. H. Hardin_