A305508 Number of nX7 0..1 arrays with every element unequal to 2, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero.

0, 702, 1722, 60352, 855017, 13419832, 235231504, 3907075261, 64554148567, 1091758542733, 18209061707696, 304661251675492, 5105283737147602, 85412880801246839, 1429775041242612805, 23935941024217852318

Offset

1,2

Comments

Column 7 of A305509.

Links

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

Example

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

Crossrefs

Cf. A305509.

Sequence in context: A269542 A237632 A304155 * A305174 A316762 A158655

Adjacent sequences: A305505 A305506 A305507 * A305509 A305510 A305511

Keyword

nonn

Author

R. H. Hardin, Jun 03 2018

Status

approved