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A221202 Number of 3Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2 1
0, 49, 46, 9025, 58700, 2518569, 32085376, 848789956, 14068757692, 311366232004, 5733258186854, 118412678934081, 2273843945394922, 45702294155340601, 892403786998151272, 17744284197389113081, 348794591561701410272 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 3 of A221200

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..30

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A299470 A226608 A027647 * A291480 A255426 A090094

Adjacent sequences:  A221199 A221200 A221201 * A221203 A221204 A221205

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 04 2013

STATUS

approved

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Last modified May 26 09:27 EDT 2019. Contains 323579 sequences. (Running on oeis4.)