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A303474 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1

%I #4 Apr 24 2018 10:46:55

%S 64,8192,240109,8511918,302023677,10589284528,373571747330,

%T 13168795781782,464090568326205,16358580942971076,576597835196073800,

%U 20323581029125802804,716356995061667848093,25249828305783449920908

%N Number of 7Xn 0..1 arrays with every element equal to 0, 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Row 7 of A303469.

%H R. H. Hardin, <a href="/A303474/b303474.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..0..0. .0..0..0..0..0

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

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

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

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

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

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

%Y Cf. A303469.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 24 2018

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Last modified July 13 17:08 EDT 2024. Contains 374284 sequences. (Running on oeis4.)