A304846 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 4 or 7 king-move adjacent elements, with upper left element zero.

32, 184, 419, 1638, 12763, 67025, 294924, 1719748, 9770201, 48882277, 259675892, 1438798433, 7606400497, 40079694163, 216576244679, 1160846367900, 6162481677404, 32970820534467, 176735199566200, 942925723444559

Offset

1,1

Comments

Column 6 of A304848.

Links

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

Example

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

Crossrefs

Cf. A304848.

Sequence in context: A316302 A165002 A165010 * A316543 A306058 A317236

Adjacent sequences: A304843 A304844 A304845 * A304847 A304848 A304849

Keyword

nonn

Author

R. H. Hardin, May 19 2018

Status

approved