A301399 Number of nX7 0..1 arrays with every element equal to 2, 3, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 41, 554, 15538, 521514, 16325745, 528025038, 16971131642, 546618326745, 17603736711807, 566956049378525, 18260390329067940, 588124654381330816, 18942222518786814929, 610087935644210871329, 19649617831383406991765

Offset

1,2

Comments

Column 7 of A301400.

Links

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

Example

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

Crossrefs

Cf. A301400.

Sequence in context: A297976 A208048 A298839 * A241622 A276251 A298627

Adjacent sequences: A301396 A301397 A301398 * A301400 A301401 A301402

Keyword

nonn

Author

R. H. Hardin, Mar 20 2018

Status

approved