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A320406 Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1

%I #4 Oct 12 2018 12:37:03

%S 16,95,548,3761,27236,191615,1353623,9623424,68454701,487378041,

%T 3471554122,24729497665,176166804149,1255112001383,8941934679343,

%U 63707927676802,453894992622140,3233839557918619,23040000280256652

%N Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Column 5 of A320409.

%H R. H. Hardin, <a href="/A320406/b320406.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A320409.

%K nonn

%O 1,1

%A _R. H. Hardin_, Oct 12 2018

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Last modified April 17 01:42 EDT 2024. Contains 371756 sequences. (Running on oeis4.)