A305763 Number of nXn 0..1 arrays with every element unequal to 0, 1, 2, 3, 4 or 7 king-move adjacent elements, with upper left element zero.

1, 8, 141, 4893, 332676, 47791549, 14187207394, 8563002028726, 10773063087952176

Offset

1,2

Comments

Diagonal of A305769.

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Cf. A305769.

Sequence in context: A367199 A239757 A295242 * A180357 A317112 A320396

Adjacent sequences: A305760 A305761 A305762 * A305764 A305765 A305766

Keyword

nonn

Author

R. H. Hardin, Jun 10 2018

Status

approved