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A302223 Number of nX7 0..1 arrays with every element equal to 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1

%I

%S 8,1934,15569,251254,3018243,42508145,553097760,7403262824,

%T 97939043966,1301831347709,17275065368012,229303687769069,

%U 3043569120232324,40395942785616147,536209245725631300,7116991167351864042

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

%C Column 7 of A302224.

%H R. H. Hardin, <a href="/A302223/b302223.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..1..1..0..0..1. .0..0..1..1..1..1..0

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

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

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

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

%Y Cf. A302224.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 03 2018

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Last modified August 12 16:32 EDT 2022. Contains 356077 sequences. (Running on oeis4.)