A222164 Number of (n+6)X1 arrays of occupancy after each element moves up to +-6 places but not 0 and without 2-loops

1583, 6075, 22955, 87009, 331273, 1265044, 4836758, 18497653

Offset

1,1

Comments

Column 6 of A222165

Links

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

Example

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

Crossrefs

Sequence in context: A182409 A350027 A224944 * A242539 A224945 A306313

Adjacent sequences: A222161 A222162 A222163 * A222165 A222166 A222167

Keyword

nonn

Author

R. H. Hardin Feb 10 2013

Status

approved