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%I #6 Nov 06 2020 19:12:14
%S 0,3,8,49,792,32193,1893682,246793217,75341044066,37956401613275
%N Number of n X n 0..1 arrays with every element unequal to 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.
%C Diagonal of A305223.
%e Some solutions for n=5
%e ..0..0..0..0..1. .0..1..1..1..1. .0..1..1..0..1. .0..1..1..1..0
%e ..1..1..0..1..0. .1..0..1..0..0. .0..1..0..1..0. .1..1..0..0..1
%e ..1..0..1..0..0. .1..1..1..1..0. .0..1..0..0..1. .1..0..1..0..1
%e ..1..0..0..1..0. .1..0..0..0..1. .0..0..1..1..1. .0..0..1..0..1
%e ..0..1..1..1..0. .0..1..1..1..0. .1..0..0..0..0. .1..1..0..1..0
%Y Cf. A305223.
%K nonn
%O 1,2
%A _R. H. Hardin_, May 27 2018