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%I #6 Dec 19 2015 09:51:37
%S 125,4616,17936,72772,273616,1042020,3883480,14617920,55503312,
%T 210277584,791400360,2978940280,11257286824,42533780480,160460490488,
%U 604824610736,2282902792488,8619222724444,32528290390168,122688090414988
%N Number of 3Xn 0..4 arrays with the absolute differences of each element with its with horizontal and antidiagonal neighbors unique.
%C Row 3 of A265928.
%H R. H. Hardin, <a href="/A265931/b265931.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..0..4..3....4..1..0..4....1..3..3..4....1..3..0..1....1..4..0..0
%e ..3..4..1..1....3..0..4..1....4..0..0..1....3..0..4..3....4..3..3..4
%e ..2..2..4..0....1..3..0..0....2..3..3..0....2..2..1..4....1..1..4..3
%Y Cf. A265928.
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 18 2015
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