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%I #4 Jan 30 2015 10:28:24
%S 81,3279,423141,199339608,310310891535,1673449182032706,
%T 29011762459538515234,1740561875727381912400072,
%U 337008848853576488534585345308
%N Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock diagonal maximum minus antidiagonal maximum nondecreasing horizontally, vertically and ne-to-sw antidiagonally
%C Diagonal of A254422
%e Some solutions for n=2
%e ..0..2..2....1..0..2....0..2..2....0..1..2....1..2..0....2..2..0....0..2..0
%e ..0..2..1....2..1..1....1..2..2....2..1..0....1..2..2....2..2..1....2..2..0
%e ..0..2..1....2..1..0....1..2..0....0..0..0....0..2..2....0..2..1....0..2..2
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 30 2015
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