A298581 Number of nX7 0..1 arrays with every element equal to 1, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

8, 99, 261, 2551, 14482, 90381, 708805, 4703257, 33115108, 242951715, 1717346931, 12261739261, 88279587687, 632361868337, 4531624593058, 32509115649588, 233191927798253, 1672553903049280, 11995741170036801, 86046219903357310

Offset

1,1

Comments

Column 7 of A298582.

Links

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

Example

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

Crossrefs

Cf. A298582.

Sequence in context: A159232 A297958 A298774 * A299573 A298395 A299513

Adjacent sequences: A298578 A298579 A298580 * A298582 A298583 A298584

Keyword

nonn

Author

R. H. Hardin, Jan 22 2018

Status

approved