A305451 Number of nX7 0..1 arrays with every element unequal to 1, 2, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

8, 306, 181, 1234, 13128, 30344, 222961, 1378090, 6504099, 42968149, 261181596, 1636206887, 10969528353, 72669507665, 509281282451, 3588484790301, 25356097139660, 185710427631939, 1352839119877860, 9884676812622517

Offset

1,1

Comments

Column 7 of A305452.

Links

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

Example

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

Crossrefs

Cf. A305452.

Sequence in context: A326013 A222792 A304057 * A304703 A316454 A305014

Adjacent sequences: A305448 A305449 A305450 * A305452 A305453 A305454

Keyword

nonn

Author

R. H. Hardin, Jun 01 2018

Status

approved