A222557 Number of (n+3)X1 arrays of occupancy after each element moves up to +-n places but not 0

4, 64, 359, 1562, 6220, 24024, 92011, 352258, 1351519

Offset

1,1

Comments

Row 3 of A222555

Links

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

Example

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

Crossrefs

Sequence in context: A299147 A141046 A264055 * A249483 A165516 A064935

Adjacent sequences: A222554 A222555 A222556 * A222558 A222559 A222560

Keyword

nonn

Author

R. H. Hardin Feb 24 2013

Status

approved