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A317564 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. 1

%I #4 Jul 31 2018 12:38:10

%S 64,8192,581541,40491721,2853437287,200422637482,14085130453968,

%T 989910863217269,69566536617221409,4888995296246370182,

%U 343585229724494063841,24146288349020453821543,1696939049515195754479868

%N Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Column 7 of A317565.

%H R. H. Hardin, <a href="/A317564/b317564.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A317565.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jul 31 2018

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Last modified April 13 05:03 EDT 2024. Contains 371639 sequences. (Running on oeis4.)