%I #6 Sep 16 2020 18:58:08
%S 0,3,43,934,42367,3640304,637088915,219692176894,138670742999582
%N Number of n X n 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
%C Diagonal of A302670.
%e Some solutions for n=5
%e ..0..0..1..1..0. .0..1..1..0..0. .0..1..1..0..0. .0..0..1..1..1
%e ..1..0..1..0..0. .1..0..1..1..0. .1..0..1..0..1. .0..1..0..0..1
%e ..0..1..1..0..1. .1..0..0..1..1. .0..0..1..1..0. .0..1..1..0..0
%e ..0..0..0..1..0. .0..1..0..1..0. .0..1..0..0..0. .1..0..1..0..1
%e ..1..1..1..0..0. .1..1..1..0..1. .1..0..1..1..1. .0..1..0..1..1
%Y Cf. A302670.
%K nonn
%O 1,2
%A _R. H. Hardin_, Apr 11 2018