%I #4 Dec 20 2015 10:28:56
%S 1,176,54,4203,624720,14337385,454759923,21604580859,889621457229,
%T 33237230186321,1314156961424515,52670841452643068,
%U 2069568617113158340,81449577335786082237,3221788440314018526529,127237760114049369621749
%N Number of 4Xn integer arrays with each element equal to the number of horizontal and antidiagonal neighbors less than or equal to itself.
%C Row 4 of A266055.
%H R. H. Hardin, <a href="/A266058/b266058.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..3..3..0....1..0..3..0....1..1..3..0....1..0..3..0....1..0..3..0
%e ..0..2..4..0....1..2..3..1....2..2..4..0....2..1..4..0....2..1..4..1
%e ..2..0..4..0....0..4..1..2....0..4..2..2....0..4..3..1....1..4..0..1
%e ..2..0..3..0....0..3..1..1....0..3..1..1....0..3..0..1....0..2..3..0
%Y Cf. A266055.
%K nonn
%O 1,2
%A _R. H. Hardin_, Dec 20 2015