%I #6 Jun 15 2020 15:07:15
%S 1,1,16,27,2156,98708,20405641,11565870189,18502726008627,
%T 89752056907627200
%N Number of n X n 0..1 arrays with every element equal to 0, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
%C Diagonal of A300138.
%e Some solutions for n=5
%e ..0..0..1..0..1. .0..1..1..0..0. .0..0..0..0..0. .0..0..0..0..1
%e ..0..0..0..0..0. .1..1..1..0..0. .0..0..1..0..0. .0..0..0..0..0
%e ..0..0..1..0..1. .0..1..1..1..1. .1..1..1..1..0. .0..0..1..0..1
%e ..0..0..0..0..0. .1..1..1..1..1. .1..1..1..0..0. .0..0..0..0..0
%e ..1..0..1..0..1. .0..1..0..1..0. .0..1..1..0..0. .1..0..0..0..1
%Y Cf. A300138.
%K nonn
%O 1,3
%A _R. H. Hardin_, Feb 26 2018
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