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A303247 Number of 7Xn 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 10:59:20

%S 64,21,1465,458,23995,41878,686376,4288552,44547581,435326091,

%T 4420070682,46247239309,488935478096,5159966424970,55400725550050,

%U 589318077173963,6332575656503077,67765552380120662,727276471899440959

%N Number of 7Xn 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 Row 7 of A303242.

%H R. H. Hardin, <a href="/A303247/b303247.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

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

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

%Y Cf. A303242.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 20 2018

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Last modified April 19 10:56 EDT 2024. Contains 371791 sequences. (Running on oeis4.)