A221103 Number of nX2 arrays of occupancy after each element moves to some king-move neighbor, without 2-loops

0, 13, 141, 1570, 16336, 168102, 1719791, 17563383, 179239960, 1828745024, 18656531088, 190324103929, 1941561709213, 19806447161642, 202051097462636, 2061178349190934, 21026637541038659, 214498395147150163

Offset

1,2

Comments

Column 2 of A221106

Links

R. H. Hardin, Table of n, a(n) for n = 1..34

Formula

Empirical: a(n) = 17*a(n-1) -80*a(n-2) +98*a(n-3) +145*a(n-4) -410*a(n-5) +336*a(n-6) -51*a(n-7) -41*a(n-8) +2*a(n-9)

Example

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

Crossrefs

Sequence in context: A210766 A045742 A122011 * A239250 A029483 A266806

Adjacent sequences: A221100 A221101 A221102 * A221104 A221105 A221106

Keyword

nonn

Author

R. H. Hardin Jan 02 2013

Status

approved