A221804 T(n,k)=Number of nXk arrays of occupancy after each element moves to some king-move neighbor, without 2-loops or left turns

0, 0, 0, 0, 9, 0, 0, 56, 56, 0, 0, 378, 1107, 378, 0, 0, 2475, 27692, 27692, 2475, 0, 0, 16256, 657057, 2341962, 657057, 16256, 0, 0, 106629, 15710423, 197382906, 197382906, 15710423, 106629, 0, 0, 699390, 374768765, 16607042116

Offset

1,5

Comments

Table starts

.0......0........0.........0.........0...........0.........0......0.0

.0......9.......56.......378......2475.......16256....106629.699390

.0.....56.....1107.....27692....657057....15710423.374768765

.0....378....27692...2341962.197382906.16607042116

.0...2475...657057.197382906

.0..16256.15710423

.0.106629

.0

Links

Table of n, a(n) for n=1..40.

Example

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

Crossrefs

Sequence in context: A255292 A103636 A278006 * A275107 A274186 A158336

Adjacent sequences: A221801 A221802 A221803 * A221805 A221806 A221807

Keyword

nonn,tabl

Author

R. H. Hardin Jan 26 2013

Status

approved