A221202 Number of 3Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2

0, 49, 46, 9025, 58700, 2518569, 32085376, 848789956, 14068757692, 311366232004, 5733258186854, 118412678934081, 2273843945394922, 45702294155340601, 892403786998151272, 17744284197389113081, 348794591561701410272

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