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A317559 Number of nXn 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. 0

%I #4 Jul 31 2018 12:34:14

%S 1,8,228,20312,5721314,5059110002,14085130453968,123418919972164971,

%T 3402595745984823716385

%N Number of nXn 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 Diagonal of A317565.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A317565.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jul 31 2018

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Last modified May 13 02:41 EDT 2024. Contains 372497 sequences. (Running on oeis4.)