%I #4 Feb 11 2015 10:09:29
%S 121,1282,49040,1892418,157053228,26791709738,7506000777648,
%T 3820686512324000,3744643102840746224,6548923551070930502468,
%U 20718929937864865377805260
%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 and no column sum 0
%C Diagonal of A254978
%e Some solutions for n=3
%e ..1..1..1..0..0....1..1..1..0..0....1..1..1..1..0....1..0..1..0..1
%e ..0..1..1..1..0....0..0..1..1..0....1..1..1..1..0....0..1..1..1..1
%e ..1..1..1..1..1....1..1..1..1..1....0..1..1..1..1....1..1..0..1..1
%e ..1..1..1..1..1....1..1..1..1..0....1..1..1..1..1....0..1..1..1..1
%e ..1..0..1..0..1....0..0..1..1..1....1..0..1..0..1....1..0..1..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 11 2015