%I #5 Feb 13 2015 07:40:40

%S 26,134,1489,21854,480456,16789556,896763036,73759241667,

%T 9393184984367,1838801806417472,553960321837762309,

%U 257519518174289401196,184540608154581393175412,203698879433082432079178111

%N Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 or 1 and no antidiagonal sum 0 or 1 and no row sum 0 or 1 and no column sum 0 or 1

%C Diagonal of A255027

%H R. H. Hardin, <a href="/A255019/b255019.txt">Table of n, a(n) for n = 1..15</a>

%e Some solutions for n=4

%e ..1..1..1..1..0..1....1..0..1..1..1..1....1..1..1..0..1..1....1..0..1..1..1..0

%e ..1..0..1..1..1..0....1..1..1..1..0..1....1..1..1..1..1..0....1..1..1..1..1..1

%e ..1..1..1..0..1..1....1..1..0..1..1..1....0..1..1..1..1..1....1..1..1..1..1..1

%e ..1..1..1..1..1..1....1..1..1..1..1..0....1..1..0..1..1..1....1..1..1..1..1..0

%e ..1..1..1..1..0..1....1..1..1..1..1..1....1..1..1..1..1..1....0..1..1..1..1..1

%e ..1..1..1..1..1..1....1..1..1..1..0..1....1..0..1..1..1..0....1..1..1..1..1..1

%Y Cf. A255027

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 13 2015