A298559 Number of nX7 0..1 arrays with every element equal to 1, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

8, 2048, 11614, 90153, 781071, 6852589, 58699120, 506226692, 4381689438, 37892530486, 327703077378, 2835741579464, 24537643875445, 212312746121732, 1837172725652853, 15897673713462844, 137567617020675562

Offset

1,1

Comments

Column 7 of A298560.

Links

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

Example

Some solutions for n=4
..0..1..0..1..1..1..0. .0..0..0..1..0..0..0. .0..0..0..1..0..0..0
..0..1..0..1..1..1..0. .0..0..0..1..1..1..1. .1..1..1..0..1..1..0
..0..1..1..0..1..1..0. .0..0..1..0..0..0..1. .1..0..0..1..1..1..0
..0..1..0..1..0..0..0. .1..1..0..1..1..0..1. .0..1..0..1..1..1..0

Crossrefs

Cf. A298560.

Sequence in context: A092414 A295217 A297950 * A298769 A299566 A298388

Adjacent sequences: A298556 A298557 A298558 * A298560 A298561 A298562

Keyword

nonn

Author

R. H. Hardin, Jan 21 2018

Status

approved