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A318023 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1

%I

%S 64,700,4495,37030,304184,2495323,20241433,163342483,1322465254,

%T 10749863872,87367578925,711940702703,5803066729053,47351790800795,

%U 386468872771749,3155746216467970,25773145361237488,210537089088168161

%N Number of nX7 0..1 arrays with every element unequal to 0, 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 7 of A318024.

%H R. H. Hardin, <a href="/A318023/b318023.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A318024.

%K nonn

%O 1,1

%A _R. H. Hardin_, Aug 12 2018

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Last modified February 8 08:32 EST 2023. Contains 360136 sequences. (Running on oeis4.)