A221253 Number of nX6 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no occupancy greater than 2

16, 2500, 488601, 103489929, 22466712321, 4919350997521, 1080371161000000, 237502965724417600, 52227958295629168900, 11486303574511411132081, 2526218624607638969433649, 555604441977129578423379025

Offset

1,1

Comments

Column 6 of A221255

Links

R. H. Hardin, Table of n, a(n) for n = 1..13

Example

Some solutions for n=3
..0..1..2..2..1..2....0..1..2..1..2..1....0..2..2..0..2..2....0..2..2..1..0..1
..1..1..1..1..1..0....0..2..1..1..2..0....0..2..1..1..2..1....0..1..1..1..2..0
..0..1..2..1..1..0....1..1..0..1..1..1....0..1..0..0..2..0....0..2..2..0..2..1

Crossrefs

Sequence in context: A227658 A298197 A016876 * A374414 A123282 A091160

Adjacent sequences: A221250 A221251 A221252 * A221254 A221255 A221256

Keyword

nonn

Author

R. H. Hardin Jan 06 2013

Status

approved