A304057 Number of nX7 0..1 arrays with every element unequal to 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.

8, 306, 124, 1122, 5415, 13624, 77360, 478889, 2630794, 17166221, 112421892, 795867513, 5624713713, 39196406339, 292217624915, 2134987451779, 15435446281689, 116004568094050, 858558798251877, 6321378051911377

Offset

1,1

Comments

Column 7 of A304058.

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..0. .0..1..0..0..0..1..0. .0..0..1..0..0..1..1
..0..1..1..1..0..0..1. .0..1..0..0..1..0..0. .1..0..0..1..0..0..0
..1..1..1..0..0..0..0. .1..1..1..1..1..1..0. .0..1..1..1..1..1..1
..1..1..1..1..0..0..1. .0..1..0..0..1..0..0. .0..0..1..0..0..1..1
..0..0..1..1..0..0..0. .1..0..0..0..0..1..0. .0..1..0..0..1..0..1

Crossrefs

Cf. A304058.

Sequence in context: A264248 A326013 A222792 * A305451 A304703 A316454

Adjacent sequences: A304054 A304055 A304056 * A304058 A304059 A304060

Keyword

nonn

Author

R. H. Hardin, May 05 2018

Status

approved