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A320403 Number of nXn 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. 0

%I #4 Oct 12 2018 12:34:15

%S 1,6,47,786,27236,1957026,282206549,84346447443,51065576746070,

%T 63169593120391316

%N Number of nXn 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 Diagonal of A320409.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A320409.

%K nonn

%O 1,2

%A _R. H. Hardin_, Oct 12 2018

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Last modified May 20 02:14 EDT 2024. Contains 372703 sequences. (Running on oeis4.)