A304958 Number of nX7 0..1 arrays with every element unequal to 1, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.

8, 928, 3917, 35441, 334906, 3174054, 30361694, 294236689, 2849022835, 27577576571, 267524005831, 2595967334283, 25167006078980, 244136931469260, 2368604689022724, 22973903107467940, 222853263910436970

Offset

1,1

Comments

Column 7 of A304959.

Links

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

Example

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

Crossrefs

Cf. A304959.

Sequence in context: A348795 A304018 A305366 * A316640 A304696 A316447

Adjacent sequences: A304955 A304956 A304957 * A304959 A304960 A304961

Keyword

nonn

Author

R. H. Hardin, May 22 2018

Status

approved