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A303257 Number of 6Xn 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1

%I

%S 0,361,5918,55624,1105676,19457754,322544617,5622650429,96079232228,

%T 1646124445916,28299650557400,485285360460841,8326738600567856,

%U 142906680823826208,2452047535254667099,42076285291701652140

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

%C Row 6 of A303254.

%H R. H. Hardin, <a href="/A303257/b303257.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

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

%Y Cf. A303254.

%K nonn

%O 1,2

%A _R. H. Hardin_, Apr 20 2018

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Last modified January 31 20:46 EST 2023. Contains 359981 sequences. (Running on oeis4.)