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Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
0

%I #4 Jul 20 2018 13:30:46

%S 1,4,25,1595,384535,354399907,1197129513001,14769904681663624,

%T 663063103032213149999

%N Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

%C Diagonal of A317065.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A317065.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jul 20 2018