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A283949 Number of nX7 0..1 arrays with no 1 equal to more than three of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element. 1

%I #4 Mar 18 2017 12:24:44

%S 0,1926,575456,64614384,6763514843,667015216686,62944601744067,

%T 5782000278310300,520411514987541560,46113717734650843082,

%U 4036254767838742279228,349783657626468531519474

%N Number of nX7 0..1 arrays with no 1 equal to more than three of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element.

%C Column 7 of A283950.

%H R. H. Hardin, <a href="/A283949/b283949.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

%Y Cf. A283950.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 18 2017

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Last modified April 25 07:07 EDT 2024. Contains 371964 sequences. (Running on oeis4.)