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A217226 Number of nX6 arrays of occupancy after each element moves to some horizontal or vertical neighbor, with no 2-loops and with no occupancy greater than 2 0
0, 918, 311988, 102825095, 31887740915, 9769688294715, 2974880888318062, 903639757522112579 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 6 of A217227

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A282592 A029897 A221387 * A217344 A221113 A062335

Adjacent sequences:  A217223 A217224 A217225 * A217227 A217228 A217229

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 07 2013

STATUS

approved

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Last modified November 30 13:47 EST 2021. Contains 349420 sequences. (Running on oeis4.)