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Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
0

%I #4 Jul 26 2018 16:58:09

%S 1,4,18,123,2089,75405,4726521,569899203,132364711390,58207830722829,

%T 48518983884550645,77042834793060609587

%N Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Diagonal of A317383.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A317383.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jul 26 2018