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A303241 Number of nX7 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1

%I #4 Apr 20 2018 10:54:51

%S 1,123,236,1676,11111,90728,686376,5320294,42575026,345713805,

%T 2801331069,22819881078,186805008216,1528961515269,12526736579284,

%U 102761508859349,843215927212293,6920803923723062,56822359222413226,466601882566586351

%N Number of nX7 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Column 7 of A303242.

%H R. H. Hardin, <a href="/A303241/b303241.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A303242.

%K nonn

%O 1,2

%A _R. H. Hardin_, Apr 20 2018

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Last modified April 16 04:38 EDT 2024. Contains 371696 sequences. (Running on oeis4.)