A316682 Number of nXn 0..1 arrays with every element unequal to 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 3, 14, 769, 101803, 43037698, 53245963290, 194833402798826, 2102329685792200336

Offset

1,2

Comments

Diagonal of A316686.

Links

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

Example

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

Crossrefs

Cf. A316686.

Sequence in context: A304059 A305453 A305016 * A268158 A367674 A050645

Adjacent sequences: A316679 A316680 A316681 * A316683 A316684 A316685

Keyword

nonn

Author

R. H. Hardin, Jul 10 2018

Status

approved