A298541 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 4 or 7 king-move adjacent elements, with upper left element zero.

0, 4, 109, 4771, 575754, 173576070, 128132389259, 235203378815314, 1070188767920257936

Offset

1,2

Comments

Diagonal of A298547.

Links

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

Example

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

Crossrefs

Cf. A298547.

Sequence in context: A037980 A240626 A297916 * A015100 A061454 A346277

Adjacent sequences: A298538 A298539 A298540 * A298542 A298543 A298544

Keyword

nonn

Author

R. H. Hardin, Jan 21 2018

Status

approved