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%I #4 Dec 09 2015 10:58:23
%S 16,366,32400,1211112,128323584,3120703104,589329511684,6424959359808,
%T 3010884585054784,30416313423877920,16127828989578410896,
%U 78450302166015801792,89417580553113361553664,268486460625576403793312
%N Number of nX4 0..n+4-2 arrays with upper left zero and lower right n+4-2 and each element differing from its diagonal and antidiagonal neighbors by one or two.
%C Column 4 of A265480.
%H R. H. Hardin, <a href="/A265476/b265476.txt">Table of n, a(n) for n = 1..47</a>
%e Some solutions for n=3
%e ..0..5..4..2....0..3..3..3....0..2..3..4....0..4..4..5....0..3..3..3
%e ..4..2..3..2....5..2..4..5....3..2..3..4....3..2..3..2....5..2..4..2
%e ..4..2..1..5....3..3..4..5....4..4..3..5....1..5..0..5....4..3..4..5
%Y Cf. A265480.
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 09 2015
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