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A301911 Number of 7Xn 0..1 arrays with every element equal to 0, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero. 1

%I

%S 64,1,117,65,196,1999,8781,104732,770376,7398173,75183520,712349998,

%T 7178506389,72042620797,721879978606,7250047119979,72777298549367,

%U 730558484014599,7332580130417856,73594615185044259,738663477116841069

%N Number of 7Xn 0..1 arrays with every element equal to 0, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.

%C Row 7 of A301906.

%H R. H. Hardin, <a href="/A301911/b301911.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

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

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

%Y Cf. A301906.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 28 2018

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Last modified September 27 20:35 EDT 2020. Contains 337388 sequences. (Running on oeis4.)