A305453 - OEIS

%I #4 Jun 01 2018 11:08:18

%S 0,3,14,661,79810,25891309,23996865179,58862515324951,

%T 398828631091652367

%N Number of nXn 0..1 arrays with every element unequal to 2, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

%C Diagonal of A305457.

%e Some solutions for n=5

%e ..0..1..1..0..1. .0..1..1..1..1. .0..1..0..1..1. .0..1..0..0..1

%e ..0..1..1..0..1. .1..0..1..0..0. .0..1..0..0..0. .0..1..1..0..1

%e ..0..1..0..0..1. .0..1..0..0..1. .1..1..0..0..1. .0..1..0..0..1

%e ..1..0..0..0..1. .0..1..0..0..0. .0..1..1..0..1. .0..0..1..0..1

%e ..1..0..1..0..1. .1..0..1..1..1. .1..0..1..1..0. .1..1..1..0..1

%Y Cf. A305457.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jun 01 2018