A304470 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 3 or 6 king-move adjacent elements, with upper left element zero.

32, 293, 810, 2957, 18879, 89071, 380640, 2075796, 10775870, 50236164, 252869601, 1311260758, 6430735023, 31832985392, 162138295874, 811240544560, 4028528684490, 20287686091795, 101987678409279, 509203732604582

Offset

1,1

Comments

Column 6 of A304472.

Links

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

Example

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

Crossrefs

Cf. A304472.

Sequence in context: A305228 A304773 A316516 * A316287 A306051 A317228

Adjacent sequences: A304467 A304468 A304469 * A304471 A304472 A304473

Keyword

nonn

Author

R. H. Hardin, May 13 2018

Status

approved