A221137 Number of nX6 arrays of occupancy after each element moves to some horizontal or vertical neighbor, with no occupancy greater than 2

16, 9801, 3485689, 1539699121, 619901126244, 259039174953636, 106295637843093924, 43910419047705413284

Offset

1,1

Comments

Column 6 of A221139

Links

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

Example

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

Crossrefs

Sequence in context: A265177 A151641 A265240 * A006448 A017092 A265634

Adjacent sequences: A221134 A221135 A221136 * A221138 A221139 A221140

Keyword

nonn

Author

R. H. Hardin Jan 02 2013

Status

approved