A257202 - OEIS

%I #5 Apr 18 2015 08:19:51

%S 512,7800,49932,387056,654637,516615,848628,1271947,1749293,2675122,

%T 3991360,5698952,8019568,11234476,15595519,21319231,28669112,38015446,

%U 50100115,65102076,83309215,106038988,134027052,167393397,207962738

%N Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally and vertically

%C Diagonal of A257209

%H R. H. Hardin, <a href="/A257202/b257202.txt">Table of n, a(n) for n = 1..31</a>

%e Some solutions for n=3

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

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

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

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

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

%Y Cf. A257209

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 18 2015