A306128 Number of nX7 0..1 arrays with every element unequal to 0, 1, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

21, 127, 147, 964, 4441, 21926, 143839, 968676, 6409145, 45379428, 328326110, 2360961270, 17104751258, 124782354715, 911201231102, 6655342338894, 48670576300697, 356230786023762, 2607478451935215, 19088148039180636

Offset

1,1

Comments

Column 7 of A306129.

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

Crossrefs

Cf. A306129.

Sequence in context: A305251 A316551 A304543 * A316310 A317265 A213565

Adjacent sequences: A306125 A306126 A306127 * A306129 A306130 A306131

Keyword

nonn

Author

R. H. Hardin, Jun 22 2018

Status

approved