%I #6 Jun 15 2020 15:09:45
%S 1,7,20,211,15171,1676663,543024998,558233828840,1538341448830389
%N Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
%C Diagonal of A300314.
%e Some solutions for n=5
%e ..0..0..0..0..0. .0..1..1..1..1. .0..1..1..1..0. .0..1..0..1..0
%e ..1..1..1..1..1. .1..1..1..0..1. .0..0..0..0..1. .0..1..1..1..0
%e ..0..0..0..0..0. .1..1..1..1..1. .0..0..0..0..1. .1..1..1..0..1
%e ..1..0..0..1..0. .1..1..1..1..1. .0..1..1..1..0. .1..1..1..1..0
%e ..0..0..0..0..0. .1..0..0..0..1. .1..1..1..0..1. .0..1..1..1..1
%Y Cf. A300314.
%K nonn
%O 1,2
%A _R. H. Hardin_, Mar 02 2018