A222351 Number of (n+7)X1 arrays of occupancy after each element moves up to +-n places including 0

987, 12087, 69142, 312019, 1284780, 5094040, 19896840, 77321250

Offset

1,1

Comments

Row 7 of A222345

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for n=3
..0....0....2....1....0....1....1....0....0....1....0....0....1....1....0....0
..0....0....0....0....3....0....1....1....1....1....0....2....3....0....0....1
..2....0....2....0....0....1....2....1....2....3....0....2....0....3....0....0
..1....1....2....0....2....1....1....2....3....0....1....0....1....0....4....0
..0....1....0....2....0....1....1....0....0....2....3....2....2....1....0....4
..0....1....2....2....1....2....3....0....1....1....1....0....0....2....5....0
..3....2....2....1....0....4....1....1....0....1....3....0....1....0....1....0
..0....1....0....2....0....0....0....1....2....1....2....4....1....0....0....0
..0....1....0....1....2....0....0....1....0....0....0....0....0....2....0....3
..4....3....0....1....2....0....0....3....1....0....0....0....1....1....0....2

Crossrefs

Sequence in context: A069299 A248352 A072316 * A221696 A221128 A045733

Adjacent sequences: A222348 A222349 A222350 * A222352 A222353 A222354

Keyword

nonn

Author

R. H. Hardin Feb 16 2013

Status

approved