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A208560
Number of n X n 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than one of its immediate leftward or upward or left-upward diagonal neighbors
1
1, 10, 1059, 600426, 1820627588, 29489112993258, 2550050797214882163, 1177059517691274455925664, 2899898779178057927709489333244, 38132339745477816025554449167624111270
OFFSET
1,2
COMMENTS
Diagonal of A208567
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..1....0..0..0..0....0..0..1..2....0..0..1..2....0..1..1..0
..1..1..1..0....1..1..1..1....0..2..2..0....2..1..0..0....1..2..2..2
..0..2..2..2....2..2..2..2....2..0..0..1....1..2..1..1....0..1..0..1
..0..1..0..0....0..0..0..0....2..1..2..1....2..1..2..2....2..0..1..2
CROSSREFS
Sequence in context: A145184 A004810 A225604 * A263311 A190945 A226553
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 28 2012
STATUS
approved