A221247 Number of 3Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor

0, 64, 1056, 45369, 1337130, 44315649, 1404725868, 45215769600, 1447056039456, 46405605611556, 1487038748557464, 47664362071029636, 1527638149928473128, 48962472488029102500, 1569278944309473869112, 50296658362620611720256

Offset

1,2

Comments

Row 3 of A221245

Links

R. H. Hardin, Table of n, a(n) for n = 1..24

Example

Some solutions for n=3
..0..3..1....0..0..0....0..0..1....0..1..0....0..1..0....0..1..2....2..4..0
..0..3..1....0..4..3....2..6..0....1..3..1....2..3..0....0..5..0....0..0..0
..1..0..0....0..2..0....0..0..0....0..2..1....0..2..1....0..0..1....1..2..0

Crossrefs

Sequence in context: A232958 A231952 A223018 * A280603 A301322 A300497

Adjacent sequences: A221244 A221245 A221246 * A221248 A221249 A221250

Keyword

nonn

Author

R. H. Hardin Jan 06 2013

Status

approved