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A303020 Number of 6Xn 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1

%I #4 Apr 17 2018 13:14:32

%S 32,857,5220,24030,160253,1298140,9976891,75234550,587492276,

%T 4655638153,36937598678,293971295920,2351936160662,18881820084138,

%U 151907805236940,1224351999451973,9884044359813506,79891695476240047,646370835714526370

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

%C Row 6 of A303016.

%H R. H. Hardin, <a href="/A303020/b303020.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

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

%Y Cf. A303016.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 17 2018

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Last modified May 3 07:04 EDT 2024. Contains 372206 sequences. (Running on oeis4.)