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Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
0

%I #4 Jul 24 2018 10:27:58

%S 1,8,46,490,17039,929233,98315821,35202633059,29277174452171,

%T 53088150169443705

%N Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Diagonal of A317230.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A317230.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jul 24 2018