A221417 Number of nX6 arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, with every occupancy equal to zero or two

8, 242, 6798, 193809, 5501288, 156275181, 4438212854, 126047555332, 3579725111162, 101663058496174, 2887188399895922, 81994856978729880, 2328615956549861402, 66131601824729724429, 1878106344412444059646

Offset

1,1

Comments

Column 6 of A221419

Links

R. H. Hardin, Table of n, a(n) for n = 1..16

Example

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

Crossrefs

Sequence in context: A301778 A158263 A367629 * A351367 A351370 A272236

Adjacent sequences: A221414 A221415 A221416 * A221418 A221419 A221420

Keyword

nonn

Author

R. H. Hardin Jan 15 2013

Status

approved