%I #6 Nov 06 2020 19:11:35
%S 0,3,4,410,26810,2549718,1069089450,830801270567,1384315836778981
%N Number of n X n 0..1 arrays with every element unequal to 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.
%C Diagonal of A305175.
%e Some solutions for n=5
%e ..0..0..1..0..0. .0..0..1..1..1. .0..0..0..1..0. .0..1..1..1..0
%e ..1..1..1..1..1. .1..1..1..0..0. .1..1..0..0..1. .1..0..0..1..0
%e ..1..0..0..1..1. .1..0..1..1..0. .0..0..0..0..0. .1..1..1..1..1
%e ..0..0..0..0..0. .0..0..1..1..0. .0..0..0..1..0. .1..0..1..0..0
%e ..1..1..0..1..1. .1..0..0..1..0. .1..1..1..0..1. .1..0..1..0..1
%Y Cf. A305175.
%K nonn
%O 1,2
%A _R. H. Hardin_, May 26 2018