A221766 Number of nX5 arrays of occupancy after each element moves to some horizontal or vertical neighbor, without 2-loops or left turns

0, 21, 536, 12177, 296912, 7115200, 170234678, 4073986651, 97465620298, 2331545530294, 55772599075464, 1334104002498388, 31912076109370226, 763341593404141513, 18259216025036326102, 436762191877943225707

Offset

1,2

Comments

Column 5 of A221768

Links

R. H. Hardin, Table of n, a(n) for n = 1..22

Example

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

Crossrefs

Sequence in context: A359852 A209348 A095655 * A080483 A015255 A034789

Adjacent sequences: A221763 A221764 A221765 * A221767 A221768 A221769

Keyword

nonn

Author

R. H. Hardin Jan 25 2013

Status

approved