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A222556 Number of (n+2)X1 arrays of occupancy after each element moves up to +-n places but not 0 0
2, 20, 102, 427, 1668, 6372, 24230, 92279, 352596 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 2 of A222555
LINKS
EXAMPLE
Some solutions for n=3
..1....3....0....0....2....0....0....2....1....2....0....0....3....2....1....1
..3....0....0....1....0....2....0....1....1....1....1....3....0....0....0....0
..0....1....3....0....2....1....4....1....1....0....2....0....0....3....4....3
..0....1....1....1....1....1....0....1....2....1....0....1....2....0....0....0
..1....0....1....3....0....1....1....0....0....1....2....1....0....0....0....1
CROSSREFS
Sequence in context: A356344 A220856 A035599 * A103101 A267678 A009357
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 24 2013
STATUS
approved

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Last modified February 25 17:53 EST 2024. Contains 370332 sequences. (Running on oeis4.)