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Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
1

%I #4 Apr 24 2018 10:21:26

%S 64,8192,658204,55681352,4729712941,401712282811,34135836415352,

%T 2900896415900109,246526793165030703,20950755659230072765,

%U 1780476037311841468019,151311828052607951348154

%N Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Column 7 of A303456.

%H R. H. Hardin, <a href="/A303455/b303455.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A303456.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 24 2018