%I
%S 1,7,52,599,15124,903707,116648010,34593556316,23228787136780,
%T 34303673074888666
%N Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
%C Diagonal of A301491.
%e Some solutions for n=5
%e ..0..1..1..0..1. .0..1..0..1..0. .0..0..1..0..0. .0..0..0..1..1
%e ..0..0..1..0..0. .0..0..1..1..1. .1..1..1..1..1. .1..1..0..0..0
%e ..1..1..0..0..1. .1..1..1..0..0. .0..1..1..1..0. .0..0..0..0..1
%e ..0..0..0..1..0. .1..1..0..1..1. .1..0..1..1..1. .1..0..0..0..0
%e ..0..1..0..1..0. .1..0..1..0..0. .1..1..0..1..0. .0..1..0..1..0
%Y Cf. A301491.
%K nonn
%O 1,2
%A _R. H. Hardin_, Mar 22 2018
