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Number of nX6 0..1 arrays with no 1 equal to more than three of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements.
1

%I #4 Mar 19 2017 20:10:27

%S 0,176,31898,2696970,189363893,11888242488,700044712076,

%T 39370013834758,2141147641452532,113490297082082382,

%U 5893425866145396208,300965611491917463584,15157259115401323272094,754409157482198595586778

%N Number of nX6 0..1 arrays with no 1 equal to more than three of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements.

%C Column 6 of A284075.

%H R. H. Hardin, <a href="/A284073/b284073.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

%Y Cf. A284075.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 19 2017