%I #6 Jun 15 2020 14:38:52
%S 1,4,1,21,231,211,6326,174794,665961,84553473,4512663317
%N Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
%C Diagonal of A299451.
%e Some solutions for n=5
%e ..0..0..0..1..1. .0..1..1..1..0. .0..1..1..1..0. .0..0..1..1..1
%e ..1..1..0..0..0. .0..1..1..1..0. .1..0..1..0..1. .0..0..1..1..1
%e ..0..0..0..0..0. .1..1..1..1..1. .1..1..1..1..1. .1..1..1..1..1
%e ..0..0..0..1..1. .1..0..1..0..1. .1..0..1..1..0. .1..1..1..0..0
%e ..1..1..0..0..0. .0..1..1..1..0. .0..1..1..0..1. .1..1..1..0..0
%Y Cf. A299451.
%K nonn
%O 1,2
%A _R. H. Hardin_, Feb 10 2018