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A220940
Number of nX3 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor
1
2, 208, 7551, 291080, 11115933, 424939090, 16241930112, 620799451653, 23728084357764, 906930211627870, 34664497553698238, 1324939111423377826, 50641541794670836181, 1935610258239045700193, 73982484134692519016233
OFFSET
1,1
COMMENTS
Column 3 of A220943
LINKS
EXAMPLE
Some solutions for n=3
..0..0..0....0..1..1....2..2..0....0..2..0....2..1..1....2..1..0....0..3..2
..3..2..2....1..1..0....0..4..1....1..0..1....0..0..1....0..1..3....0..1..1
..1..0..1....3..2..0....0..0..0....3..2..0....1..3..0....1..0..1....0..2..0
CROSSREFS
Sequence in context: A110899 A363461 A281126 * A012600 A157479 A355904
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 25 2012
STATUS
approved