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%I #6 Aug 12 2016 06:53:59
%S 1,23,632,20592,734400,27705984,1086831962,43880429586,1811403496610,
%T 76104309064345,3243585449869690,139894941451780572,
%U 6094362820563358094,267775378869795256077,11852898175993602480090,528058236407010277514014
%N Number of 4Xn arrays containing n copies of 0..4-1 with no equal vertical or antidiagonal neighbors and new values introduced sequentially from 0.
%C Row 4 of A265679.
%H R. H. Hardin, <a href="/A265681/b265681.txt">Table of n, a(n) for n = 1..25</a>
%e Some solutions for n=4
%e ..0..0..1..1....0..0..1..2....0..1..0..2....0..1..0..0....0..1..2..2
%e ..2..3..3..0....3..2..3..0....3..3..1..1....2..3..1..1....3..3..0..0
%e ..1..0..1..3....1..1..2..2....2..2..3..2....1..2..0..3....2..1..3..3
%e ..2..3..2..2....3..0..3..1....3..0..1..0....3..3..2..2....0..2..1..1
%Y Cf. A265679.
%K nonn
%O 1,2
%A _R. H. Hardin_, Dec 13 2015
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