A281343 Number of nX7 0..1 arrays with no element equal to more than three of its king-move neighbors and with new values introduced in order 0 sequentially upwards.

64, 3281, 4355, 18189, 60540, 198619, 639142, 2039214, 6489813, 20683647, 65987467, 210970521, 675532316, 2165041339, 6942289440, 22270716585, 71468916039, 229423662632, 736691206279, 2366141286606, 7601378517849

Offset

1,1

Comments

Column 7 of A281344.

Links

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

Example

Some solutions for n=4
..0..1..0..0..0..1..0. .0..1..1..0..0..0..1. .0..0..1..1..1..1..0
..1..1..1..1..1..0..1. .0..0..1..0..1..1..0. .0..1..0..0..0..0..1
..0..0..0..0..1..0..1. .1..0..1..0..1..0..0. .0..1..0..1..1..1..0
..1..1..1..0..0..1..1. .1..0..1..0..1..0..1. .1..1..0..1..0..0..1

Crossrefs

Cf. A281344.

Sequence in context: A181249 A260857 A183814 * A298286 A299358 A299179

Adjacent sequences: A281340 A281341 A281342 * A281344 A281345 A281346

Keyword

nonn

Author

R. H. Hardin, Jan 20 2017

Status

approved