A280179 - OEIS

A280179

Number of nX7 0..1 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

%I #4 Dec 28 2016 07:03:18

%S 15,656,13720,202693,2665301,31821879,359880117,3910652938,

%T 41205820599,424186764568,4286516071132,42663698232264,

%U 419306557225259,4077141776062489,39281413060768999,375445083262145664

%N Number of nX7 0..1 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

%C Column 7 of A280180.

%H R. H. Hardin, <a href="/A280179/b280179.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

%Y Cf. A280180.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 28 2016