A305359 Number of nX7 0..1 arrays with every element unequal to 0, 2, 3, 5 or 8 king-move adjacent elements, with upper left element zero.

1, 99, 99, 211, 656, 1476, 4429, 11281, 31062, 84750, 233266, 652271, 1795948, 4991011, 13877748, 38640817, 107514978, 299535232, 834994559, 2326796881, 6487438589, 18090082485, 50450315901, 140711717327, 392491509481

Offset

1,2

Comments

Column 7 of A305360.

Links

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

Example

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

Crossrefs

Cf. A305360.

Sequence in context: A298509 A185504 A304009 * A213157 A317592 A296881

Adjacent sequences: A305356 A305357 A305358 * A305360 A305361 A305362

Keyword

nonn

Author

R. H. Hardin, May 31 2018

Status

approved