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%I #4 Dec 02 2013 18:56:55
%S 4096,352947,85202361,18193384251,4082986991091,913176469752921,
%T 205030957086979647,46049854148275821783,10347651822185274889503,
%U 2325450833294278864661895,522642603826819656267942471
%N Number of 7Xn 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, diagonally or antidiagonally, and top left element zero
%C Row 7 of A232955
%H R. H. Hardin, <a href="/A232961/b232961.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=2
%e ..0..0....0..2....0..2....0..2....0..2....0..2....0..2....0..0....0..2....0..0
%e ..2..2....0..2....0..0....0..2....0..2....0..2....0..0....0..0....0..2....0..0
%e ..3..2....2..0....1..0....0..2....2..2....3..2....1..0....0..2....2..2....0..1
%e ..3..3....0..0....2..0....0..2....3..2....0..2....2..3....3..1....0..0....1..1
%e ..2..3....0..2....1..3....0..1....0..2....3..2....1..0....0..1....0..0....3..3
%e ..3..3....3..2....3..1....3..1....0..2....3..2....2..0....0..2....0..0....3..1
%e ..2..2....3..2....3..3....1..3....3..1....3..3....0..0....2..2....0..0....0..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 02 2013