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A298661 Number of n X n 0..1 arrays with every element equal to 0, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero. 0

%I

%S 1,1,3,2,20,169,978,22938,329249,12541065,628713833

%N Number of n X n 0..1 arrays with every element equal to 0, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

%C Diagonal of A298667.

%e Some solutions for n=8

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

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

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

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

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

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

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

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

%Y Cf. A298667.

%K nonn

%O 1,3

%A _R. H. Hardin_, Jan 24 2018

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Last modified June 13 18:45 EDT 2021. Contains 345008 sequences. (Running on oeis4.)