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

%I #6 Nov 06 2020 19:12:38

%S 1,8,24,116,757,7062,135183,4217359,251711366,26201772355,

%T 5004642648682,1701933414189511,1046175213710985327,

%U 1152072797809868185976,2282648962854010752666780,8117018772747629068352653449

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

%C Diagonal of A305230.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A305230.

%K nonn

%O 1,2

%A _R. H. Hardin_, May 27 2018