%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