%I #6 Jun 15 2020 11:19:05
%S 0,3,15,78,765,16521,708805,40964223,4776371282,1079598223972
%N Number of n X n 0..1 arrays with every element equal to 1, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero.
%C Diagonal of A298582.
%e Some solutions for n=5
%e ..0..1..1..1..0. .0..0..0..0..0. .0..1..1..1..0. .0..0..0..0..0
%e ..0..1..0..1..0. .1..1..1..1..1. .1..0..0..0..1. .1..0..0..0..1
%e ..1..0..1..0..1. .0..1..1..1..0. .1..0..0..0..1. .1..0..1..0..1
%e ..1..0..0..0..1. .0..1..0..1..0. .1..0..1..0..1. .0..1..0..1..0
%e ..0..0..0..0..0. .1..1..0..1..1. .0..1..0..1..0. .1..0..1..0..1
%Y Cf. A298582.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jan 22 2018