A297588 Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 4 neighboring 1s.

1, 178, 3854, 17549, 171543, 3230902, 38609160, 348140132, 4059598106, 52019909493, 586271189408, 6378535786438, 74263762213809, 871302311717772, 9894632611196172, 112311237616769754, 1295286294924141697

Offset

1,2

Comments

Row 7 of A297582.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Cf. A297582.

Sequence in context: A297400 A297600 A296824 * A189440 A163730 A157842

Adjacent sequences: A297585 A297586 A297587 * A297589 A297590 A297591

Keyword

nonn

Author

R. H. Hardin, Jan 01 2018

Status

approved