%I #6 Sep 16 2020 18:57:03
%S 0,3,28,168,3683,182773,16130212,1916999716,305442540368
%N Number of n X n 0..1 arrays with every element equal to 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
%C Diagonal of A302528.
%e Some solutions for n=5
%e ..0..1..1..1..0. .0..1..0..1..0. .0..0..0..0..0. .0..1..1..0..1
%e ..0..0..0..0..1. .0..0..1..0..1. .0..1..0..1..0. .1..0..0..1..0
%e ..0..1..0..1..0. .0..1..0..1..0. .0..0..1..0..1. .0..0..0..0..0
%e ..1..1..1..1..0. .0..0..1..0..1. .0..0..1..0..1. .0..1..1..0..0
%e ..0..0..0..0..1. .0..1..0..1..0. .0..1..0..1..0. .0..0..1..1..0
%Y Cf. A302528.
%K nonn
%O 1,2
%A _R. H. Hardin_, Apr 09 2018