A316572 - OEIS

%I #4 Jul 07 2018 08:25:04

%S 1,4,11,246,3180,129257,8469438,730909482,185758559665,50251974557654

%N Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 4, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Diagonal of A316576.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A316576.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jul 07 2018