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A221138
Number of n X 7 arrays of occupancy after each element moves to some horizontal or vertical neighbor, with no occupancy greater than 2.
0
32, 57121, 58132316, 75512292025, 86907967843320, 106295637843093924
OFFSET
1,1
COMMENTS
Column 7 of A221139.
EXAMPLE
Some solutions for n=3
..0..1..2..2..1..1..1....0..1..2..2..1..1..0....0..1..1..2..1..1..0
..0..1..2..2..1..2..1....0..1..1..2..2..2..0....0..1..1..2..2..1..0
..0..1..1..0..0..2..0....0..1..2..1..0..2..0....0..1..2..2..2..1..0
CROSSREFS
Cf. A221139.
Sequence in context: A362175 A221086 A054374 * A017009 A176030 A034245
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 02 2013
STATUS
approved