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%I #6 Jun 15 2020 15:03:40
%S 1,7,20,75,644,4604,116051,5133698,330723200,54246156735
%N Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
%C Diagonal of A299948.
%e Some solutions for n=5
%e ..0..1..0..0..0. .0..0..1..0..1. .0..0..0..0..0. .0..1..0..1..1
%e ..0..0..0..0..1. .1..0..1..0..0. .1..1..1..1..1. .0..0..0..1..0
%e ..0..0..0..0..1. .0..0..1..0..0. .0..0..0..0..0. .0..0..1..0..1
%e ..1..0..1..1..0. .0..0..1..0..1. .0..1..0..0..1. .1..0..0..1..0
%e ..1..0..1..0..1. .1..0..1..0..0. .0..0..0..0..0. .1..1..0..1..1
%Y Cf. A299948.
%K nonn
%O 1,2
%A _R. H. Hardin_, Feb 22 2018
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