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A208579
Number of nX4 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors
1
15, 3024, 2946848, 7289707650, 36182978136598, 314946169382603268, 4397499594659018513529, 92408426611916813238982284, 2785236864744413991459135045397, 115957546355673301589831649844689014
OFFSET
1,1
COMMENTS
Column 4 of A208581
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..1..1..1..0....1..1..1..2....1..1..1..0....1..1..1..2....1..1..1..0
..0..0..1..0....2..0..0..0....2..0..1..0....2..0..0..0....0..2..1..0
..1..0..1..0....0..1..1..0....0..1..0..1....0..1..1..2....0..0..3..1
CROSSREFS
Sequence in context: A249965 A108281 A232455 * A080691 A208584 A211903
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 29 2012
STATUS
approved