A221260 - OEIS

A221260

Number of 6Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no occupancy greater than 2

0, 1024, 1560, 44903401, 4684821704, 4919350997521, 1286684357154700, 711683286892712289, 249788326721013262468, 113635514869793774013025, 44202928096066452637659216

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Row 6 of A221255

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=3

..0..2..2....1..2..0....1..2..0....1..2..0....0..2..1....0..2..1....0..2..1

..0..2..1....1..2..0....0..2..0....0..2..0....0..2..2....0..2..0....0..2..0

..0..2..1....0..2..0....1..2..2....2..2..0....0..2..1....2..2..0....1..2..0

..0..2..0....1..2..1....0..2..0....0..2..1....0..2..1....1..2..0....1..2..1

..0..2..0....1..2..0....0..2..1....0..2..1....0..2..0....0..2..0....0..2..0

..2..2..0....0..2..1....0..2..1....0..2..1....1..2..0....2..2..0....1..2..1

CROSSREFS

Sequence in context: A057443 A046313 A046314 * A223065 A298607 A366391

Adjacent sequences: A221257 A221258 A221259 * A221261 A221262 A221263

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 06 2013

STATUS

approved