%I #6 Sep 16 2020 19:04:51
%S 0,3,28,168,4013,236326,24386918,4298730424,1222253462556
%N Number of n X n 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
%C Diagonal of A303410.
%e Some solutions for n=5
%e ..0..1..1..1..0. .0..1..1..0..0. .0..1..0..1..0. .0..1..1..1..0
%e ..0..0..1..0..0. .0..0..1..1..0. .1..0..1..0..1. .1..0..0..0..0
%e ..0..0..0..0..0. .0..0..0..0..0. .1..1..1..1..1. .0..0..0..0..0
%e ..0..1..1..1..0. .0..1..0..0..1. .0..1..1..1..1. .0..1..1..1..0
%e ..0..0..1..0..0. .1..0..1..1..0. .1..0..0..0..1. .0..0..1..0..0
%Y Cf. A303410.
%K nonn
%O 1,2
%A _R. H. Hardin_, Apr 23 2018