%I #6 Jun 15 2020 14:47:52
%S 0,1,9,130,21367,7242300,9743385598,43313516068423,635719287829223338
%N Number of n X n 0..1 arrays with every element equal to 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.
%C Diagonal of A299602.
%e Some solutions for n=5
%e ..0..0..0..0..1. .0..0..0..1..1. .0..1..1..0..0. .0..0..1..1..1
%e ..0..0..0..1..1. .0..0..0..0..1. .0..0..1..1..0. .0..1..1..1..1
%e ..0..0..0..0..1. .1..1..1..1..1. .0..0..0..1..1. .0..1..1..1..1
%e ..1..1..1..0..1. .1..1..1..0..0. .0..0..0..1..1. .0..1..0..1..1
%e ..1..1..1..1..1. .1..1..1..1..0. .0..0..0..1..1. .0..0..0..0..1
%Y Cf. A299602.
%K nonn
%O 1,3
%A _R. H. Hardin_, Feb 14 2018