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A318042 Number of nX5 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1

%I #4 Aug 13 2018 14:32:02

%S 1,6,86,905,10563,116212,1304057,14683085,165135266,1856998899,

%T 20884326520,234874162302,2641473216596,29706814482309,

%U 334092069568548,3757304519668705,42255828257649535,475222320626098607

%N Number of nX5 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 5 of A318045.

%H R. H. Hardin, <a href="/A318042/b318042.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A318045.

%K nonn

%O 1,2

%A _R. H. Hardin_, Aug 13 2018

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Last modified July 13 07:05 EDT 2024. Contains 374267 sequences. (Running on oeis4.)