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A300681 Number of nX7 0..1 arrays with every element equal to 0, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1

%I

%S 1,74,131,729,6686,54361,494771,4174087,37464671,329141039,2923001082,

%T 26034480835,231283871073,2056909000750,18288923262193,

%U 162634964488741,1446254340101947,12860864631967374,114369341426371921

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

%C Column 7 of A300682.

%H R. H. Hardin, <a href="/A300681/b300681.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A300682.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 11 2018

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Last modified February 25 11:19 EST 2021. Contains 341606 sequences. (Running on oeis4.)