%I
%S 2500,22631,219438,2000385,17316309,128407497,912012350,5602735678,
%T 33436453693,176885943216,917401073689,4314850614208,20011936293206,
%U 85743645410236,363685859775159,1446109155724143,5708063204873431
%N Number of (3+1)X(n+1) 0..2 arrays with every 2X2 subblock sum nondecreasing horizontally, vertically and antidiagonally netosw
%C Row 3 of A253375
%H R. H. Hardin, <a href="/A253377/b253377.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=2
%e ..1..0..1....2..0..1....0..2..2....2..2..1....1..0..1....2..0..2....2..1..2
%e ..0..2..0....1..0..2....0..2..0....1..0..2....0..0..0....0..0..0....1..1..2
%e ..2..1..2....1..1..1....2..2..2....2..2..2....1..1..2....2..0..2....2..2..2
%e ..1..2..1....1..1..1....0..2..0....1..2..1....0..2..0....0..2..2....2..1..2
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 30 2014
