%I #4 Jan 02 2015 19:23:33
%S 81,1377,4196,10477,32652,113573,415106,1561268,5980490,23190284,
%T 90686546,356759588,1409549210,5586667004
%N Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and netosw antidiagonally
%C Diagonal of A253495
%e Some solutions for n=4
%e ..1..1..1..2..1....0..2..2..1..2....1..2..2..2..2....1..2..1..1..1
%e ..2..1..1..2..1....0..1..1..0..1....1..1..1..1..1....1..1..0..0..0
%e ..2..1..1..2..1....1..2..2..1..2....2..2..2..2..2....2..2..1..1..1
%e ..1..0..0..1..0....1..2..2..1..2....2..2..2..2..2....1..1..0..0..0
%e ..2..1..1..2..1....1..2..2..1..2....1..1..1..1..2....1..1..0..1..2
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 02 2015
