A298056 Number of n X n 0..1 arrays with every element equal to 1, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

0, 4, 0, 11, 441, 474, 11025, 2461790, 26389664, 6708989807

Offset

1,2

Comments

Diagonal of A298063.

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=7
..0..0..0..1..0..1..0. .0..1..1..0..0..0..1. .0..0..1..0..0..1..1
..0..0..1..0..0..0..1. .0..1..1..0..0..1..0. .0..0..0..1..0..0..0
..1..1..1..1..0..1..1. .1..1..1..1..0..0..0. .1..1..1..1..0..1..1
..1..1..1..1..0..1..0. .1..1..0..1..0..1..0. .0..0..1..0..0..1..1
..0..0..1..0..0..0..1. .0..0..0..0..1..0..0. .1..1..1..1..0..0..0
..0..0..1..0..0..0..0. .1..1..0..1..1..0..1. .0..0..0..0..1..1..1
..1..1..1..1..1..0..0. .1..1..0..1..1..0..1. .1..1..0..1..0..1..1

Crossrefs

Cf. A298063.

Sequence in context: A019207 A373742 A298449 * A298706 A369911 A260490

Adjacent sequences: A298053 A298054 A298055 * A298057 A298058 A298059

Keyword

nonn

Author

R. H. Hardin, Jan 11 2018

Status

approved