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A221302
Number of n X 7 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, with no occupancy greater than 2.
0
239, 388741, 668597561, 1170461488239, 2055191230733819, 3609497709468161601
OFFSET
1,1
COMMENTS
Column 7 of A221303.
EXAMPLE
Some solutions for n=3
..0..1..1..1..1..2..1....0..1..1..2..2..1..2....0..1..1..2..2..2..1
..0..1..2..0..1..1..1....0..1..1..0..0..2..1....0..1..1..0..0..0..0
..0..1..1..2..2..0..2....0..1..2..2..1..1..0....0..1..2..1..2..2..2
CROSSREFS
Cf. A221303.
Sequence in context: A223974 A208681 A221327 * A072173 A282230 A015161
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 09 2013
STATUS
approved