A300174 Number of nX7 0..1 arrays with every element equal to 2, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 104, 4712, 223445, 16262433, 1068913988, 73267622156, 5003777484149, 342457741960757, 23463084389592468, 1607692436522081299, 110183824161597193152, 7551825160644408582307, 517606569952457413522169

Offset

1,2

Comments

Column 7 of A300175.

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

Crossrefs

Cf. A300175.

Sequence in context: A185741 A299333 A007267 * A250668 A035811 A004393

Adjacent sequences: A300171 A300172 A300173 * A300175 A300176 A300177

Keyword

nonn

Author

R. H. Hardin, Feb 27 2018

Status

approved