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A303518 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1

%I #4 Apr 25 2018 12:32:27

%S 64,2785,49740,377020,5520182,130480638,2346396384,36337215370,

%T 621454623913,11212991139339,196019654779374,3364469109355161,

%U 58479744323851739,1023251199975846576,17836187188799591784

%N Number of 7Xn 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Row 7 of A303513.

%H R. H. Hardin, <a href="/A303518/b303518.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

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

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

%Y Cf. A303513.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 25 2018

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Last modified July 13 15:41 EDT 2024. Contains 374284 sequences. (Running on oeis4.)