A305087 Number of nX6 0..1 arrays with every element unequal to 1, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero.

5, 157, 438, 372, 15814, 101803, 285422, 3531950, 30133609, 154643412, 1197607542, 9877914471, 64506159901, 457810704440, 3502599638234, 24766267017652, 175596992174688, 1292154109782819, 9320946559486284, 66689569914020973

Offset

1,1

Comments

Column 6 of A305089.

Links

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

Example

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

Crossrefs

Cf. A305089.

Sequence in context: A139978 A304147 A305487 * A316738 A009082 A156134

Adjacent sequences: A305084 A305085 A305086 * A305088 A305089 A305090

Keyword

nonn

Author

R. H. Hardin, May 25 2018

Status

approved