%I #7 Apr 05 2018 04:09:59
%S 0,3,22,89,1219,15862,384916,11370253,325745362,20953111994
%N Number of n X n 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
%C Diagonal of A302278.
%e Some solutions for n=5:
%e 0 0 1 0 0 0 1 1 0 1 0 1 1 0 0 0 1 1 0 0
%e 1 0 0 1 1 1 0 0 1 1 1 0 0 1 1 0 0 1 1 1
%e 0 1 0 0 0 0 1 0 1 1 0 0 0 0 0 0 1 0 1 1
%e 1 1 0 1 1 0 1 0 0 0 1 1 0 0 1 0 1 1 0 0
%e 1 0 0 1 1 1 0 1 1 0 0 0 1 1 0 1 0 0 1 0
%Y Cf. A302278.
%K nonn
%O 1,2
%A _R. H. Hardin_, Apr 04 2018