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%I #4 Dec 09 2015 10:50:16
%S 16,232,9808,398508,17481072,593770274,18032679492,582513489941,
%T 20195132214242,664241150437850,19904753690273680,578485017566375562,
%U 17470345171228192441,541176178303872764969,16319402667685554635137
%N Number of 4Xn 0..4+n-2 arrays with upper left zero and lower right 4+n-2 and each element differing from its horizontal and antidiagonal neighbors by one or two.
%C Row 4 of A265466.
%H R. H. Hardin, <a href="/A265469/b265469.txt">Table of n, a(n) for n = 1..162</a>
%e Some solutions for n=3
%e ..0..2..3....0..1..3....0..1..2....0..2..1....0..2..3....0..2..3....0..1..3
%e ..3..4..5....3..4..5....2..3..5....1..3..5....3..1..2....4..2..3....3..4..5
%e ..3..4..5....3..4..3....4..3..5....5..3..5....2..3..5....1..2..4....3..4..3
%e ..5..4..5....5..4..5....5..3..5....4..3..5....5..3..5....1..3..5....2..4..5
%Y Cf. A265466.
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 09 2015
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