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A305679 Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero. 0

%I

%S 1,4,25,1595,383910,351440611,1172824606532,14227138873003015,

%T 624906012671792336577

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

%C Diagonal of A305685.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A305685.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jun 08 2018

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Last modified June 29 10:17 EDT 2022. Contains 354913 sequences. (Running on oeis4.)