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Number of 7Xn 0..1 arrays with no 1 equal to more than two of its horizontal, diagonal and antidiagonal neighbors.
1

%I #4 Mar 14 2017 16:21:53

%S 128,10329,285770,14754038,726353972,31815868749,1496646288297,

%T 69850963263086,3221369052765009,149740885820566547,

%U 6952281674548007260,322402225772561502269,14963967565321593288677,694424158390671052514851

%N Number of 7Xn 0..1 arrays with no 1 equal to more than two of its horizontal, diagonal and antidiagonal neighbors.

%C Row 7 of A283691.

%H R. H. Hardin, <a href="/A283697/b283697.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

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

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

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

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

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

%Y Cf. A283691.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 14 2017