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%I #4 Apr 22 2015 10:36:41
%S 512,7652,117324,1770206,12316842,115919394,1037269100,6191314193,
%T 57799643410,478127487069,2903676329504,27615631745955,
%U 219195987569254,1325497215293808
%N Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally
%C Diagonal of A257426
%e Some solutions for n=3
%e ..0..0..0..1..0....0..0..1..1..1....0..0..0..0..0....1..0..0..1..1
%e ..0..0..0..1..1....0..0..0..0..0....1..0..0..0..1....0..0..1..0..1
%e ..0..1..1..1..0....1..1..0..1..0....0..0..1..1..1....0..0..0..0..1
%e ..0..0..0..0..0....0..1..0..1..1....1..1..1..1..0....0..1..1..1..1
%e ..0..1..1..0..1....0..0..0..1..1....0..1..1..1..0....0..1..1..1..0
%Y Cf. A257426
%K nonn
%O 1,1
%A _R. H. Hardin_, Apr 22 2015