A316449 - OEIS

%I #4 Jul 03 2018 09:16:43

%S 0,3,9,48,1591,53863,4145337,935229204,873192441329

%N Number of nXn 0..1 arrays with every element unequal to 1, 2, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

%C Diagonal of A316455.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A316455.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jul 03 2018