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A283231 Number of nX7 0..1 arrays with no 1 equal to more than two of its horizontal and vertical neighbors, with the exception of exactly two elements. 1

%I #4 Mar 03 2017 09:06:56

%S 0,1376,338397,47531178,5735340380,628267302565,64590243667344,

%T 6347644826932771,603124906010664854,55820729585827738580,

%U 5058732535887213720189,450601583645724092513122

%N Number of nX7 0..1 arrays with no 1 equal to more than two of its horizontal and vertical neighbors, with the exception of exactly two elements.

%C Column 7 of A283232.

%H R. H. Hardin, <a href="/A283231/b283231.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

%Y Cf. A283232.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 03 2017

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Last modified May 7 13:58 EDT 2024. Contains 372310 sequences. (Running on oeis4.)