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A208560 revision #3

A208560 Number of nXn 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 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A208567
LINKS
Table of n, a(n) for n=1..10.
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
Adjacent sequences: A208557 A208558 A208559 * A208561 A208562 A208563
KEYWORD
nonn
AUTHOR
R. H. Hardin (rhhardin(AT)att.net) Feb 28 2012
STATUS
editing

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Last modified August 30 13:06 EDT 2024. Contains 375543 sequences. (Running on oeis4.)