A221614 Number of 6Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without move-in move-out left turns

0, 32, 8072, 2764070, 804371949, 240257613761, 72063803799931, 21695654478885490

Offset

1,2

Comments

Row 6 of A221609

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A334604 A342455 A351805 * A086752 A248001 A159679

Adjacent sequences: A221611 A221612 A221613 * A221615 A221616 A221617

Keyword

nonn

Author

R. H. Hardin Jan 20 2013

Status

approved