A221090 Number of 4Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor

0, 64, 3024, 279841, 20489472, 1572836281, 118704053710, 8994906720801, 680750019301486, 51538469967056164, 3901482828808418205, 295352521055213734564, 22358767209627320059672, 1692606840605154489536964

Offset

1,2

Comments

Row 4 of A221087

Links

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

Example

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

Crossrefs

Sequence in context: A221831 A282397 A297100 * A342709 A264094 A181249

Adjacent sequences: A221087 A221088 A221089 * A221091 A221092 A221093

Keyword

nonn

Author

R. H. Hardin Jan 01 2013

Status

approved