A305483 Number of nXn 0..1 arrays with every element unequal to 1, 2, 3, 6 or 8 king-move adjacent elements, with upper left element zero.

0, 7, 19, 65, 2094, 23229, 65452, 35294211, 2468446765, 113516758846, 82731232832507

Offset

1,2

Comments

Diagonal of A305489.

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for n=5
..0..0..1..1..1. .0..0..0..0..0. .0..0..1..1..1. .0..1..0..0..0
..0..1..1..0..1. .0..1..0..1..0. .0..1..1..0..1. .1..1..0..1..0
..1..1..1..0..0. .0..0..0..0..0. .1..1..1..1..1. .0..0..0..0..0
..1..0..1..1..1. .1..1..0..0..1. .1..1..0..1..1. .1..0..0..1..0
..1..1..1..1..0. .0..1..0..1..1. .1..0..0..1..0. .1..1..0..1..1

Crossrefs

Cf. A305489.

Sequence in context: A346851 A155384 A155218 * A046137 A193643 A228026

Adjacent sequences: A305480 A305481 A305482 * A305484 A305485 A305486

Keyword

nonn

Author

R. H. Hardin, Jun 02 2018

Status

approved