A304603 Number of n X 7 0..1 arrays with every element unequal to 0, 1, 2, 5 or 6 king-move adjacent elements, with upper left element zero.

64, 101, 330, 1450, 5205, 19634, 75463, 317420, 1356754, 5638479, 22732759, 91350019, 373633293, 1543605001, 6356149925, 25997316856, 106077943180, 433845348217, 1778745827391, 7294395546482, 29879499739692, 122299513350861

Offset

1,1

Comments

Column 7 of A304604.

Links

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

Example

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

Crossrefs

Cf. A304604.

Sequence in context: A118488 A088033 A303960 * A305339 A304925 A316419

Adjacent sequences: A304600 A304601 A304602 * A304604 A304605 A304606

Keyword

nonn

Author

R. H. Hardin, May 15 2018

Status

approved