%I #5 Aug 08 2015 14:03:03
%S 28,52,278,1498,13040,127038,2037285,35551388,1021480084,32245216400,
%T 1673092329256,95096605137684,8890756299113053,911310851213791400,
%U 153607181860224749014,28380233483547958852746,8623267987086739769774234
%N Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010001 00010101 or 01010101
%C Diagonal of A261113
%H R. H. Hardin, <a href="/A261105/b261105.txt">Table of n, a(n) for n = 1..22</a>
%e Some solutions for n=4
%e ..1..0..1..0..1..0....1..0..0..0..1..0....0..1..0..1..0..0....0..1..0..1..0..1
%e ..0..1..0..1..0..0....0..1..0..1..0..1....1..0..0..0..1..0....1..0..1..0..1..0
%e ..0..0..1..0..1..0....0..0..1..0..1..0....0..1..0..1..0..1....0..0..0..1..0..0
%e ..0..1..0..1..0..1....0..1..0..1..0..1....1..0..1..0..1..0....1..0..1..0..1..0
%e ..1..0..0..0..1..0....1..0..1..0..0..0....0..0..0..1..0..1....0..1..0..1..0..1
%e ..0..1..0..1..0..0....0..1..0..1..0..1....0..0..1..0..1..0....0..0..1..0..1..0
%Y Cf. A261113
%K nonn
%O 1,1
%A _R. H. Hardin_, Aug 08 2015