A221803 Number of nX4 arrays of occupancy after each element moves to some king-move neighbor, without 2-loops or left turns

0, 378, 27692, 2341962, 197382906, 16607042116, 1396934985595, 117495706868182, 9880812782673851

Offset

1,2

Comments

Column 4 of A221804

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Sequence in context: A325848 A248915 A225839 * A289347 A171115 A328552

Adjacent sequences: A221800 A221801 A221802 * A221804 A221805 A221806

Keyword

nonn

Author

R. H. Hardin Jan 26 2013

Status

approved