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A316517 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3, 7 or 8 king-move adjacent elements, with upper left element zero. 1

%I #4 Jul 05 2018 07:16:22

%S 64,719,1002,4894,48677,432088,3646656,32938897,290133839,2562456375,

%T 22728069640,201003310339,1779143777742,15749640647849,

%U 139387918052540,1233758985418234,10920131413523623,96653911737990883,855492234969744992

%N Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Column 7 of A316518.

%H R. H. Hardin, <a href="/A316517/b316517.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A316518.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jul 05 2018

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Last modified April 24 04:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)