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Unmatched value maps: number of nX7 binary arrays indicating the locations of corresponding elements not equal to any horizontal, vertical or antidiagonal neighbor in a random 0..1 nX7 array
2

%I #6 Aug 22 2013 14:05:11

%S 37,277,3606,39905,466288,5350080,61758332,711479843,8201909757,

%T 94531063074,1089590912023,12558669019786,144752526242487,

%U 1668430514943073,19230483410164823,221652312986931867

%N Unmatched value maps: number of nX7 binary arrays indicating the locations of corresponding elements not equal to any horizontal, vertical or antidiagonal neighbor in a random 0..1 nX7 array

%C Column 7 of A219741

%H R. H. Hardin, <a href="/A219740/b219740.txt">Table of n, a(n) for n = 1..43</a>

%F Zeilberger's Maple code (see links in A228285) would give a recurrence for this sequence. - N. J. A. Sloane, Aug 22 2013

%e Some solutions for n=3

%e ..0..0..1..0..0..0..1....1..0..0..0..0..0..1....0..0..1..0..0..1..0

%e ..0..0..0..0..0..0..0....0..1..0..0..1..0..0....0..0..0..0..0..0..0

%e ..1..0..1..0..0..0..1....0..0..0..0..0..1..0....0..1..0..1..0..0..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Nov 26 2012