A304308 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero.

32, 569, 3270, 22089, 145369, 989406, 6692008, 45578982, 310837633, 2122468415, 14501325198, 99120478481, 677647417021, 4633515032396, 31685001504959, 216680410191236, 1481835432845882, 10134192131855134, 69308068436080264

Offset

1,1

Comments

Column 6 of A304310.

Links

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

Example

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

Crossrefs

Cf. A304310.

Sequence in context: A082557 A022660 A220631 * A316207 A305774 A317123

Adjacent sequences: A304305 A304306 A304307 * A304309 A304310 A304311

Keyword

nonn

Author

R. H. Hardin, May 10 2018

Status

approved