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A208587 Number of 7Xn 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 0
877, 151329962, 346279494967526, 4397499594659018513529, 200823740464350277512414467867 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 7 of A208581
LINKS
EXAMPLE
Some solutions for n=3
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..1..1..1....1..1..0....1..1..0....1..1..0....1..1..0....1..1..0....1..1..0
..0..0..0....0..1..0....2..1..0....0..1..0....0..1..0....2..0..1....0..2..0
..1..1..0....2..3..0....0..1..3....0..1..0....0..1..0....0..1..0....0..3..0
..0..1..0....0..1..0....1..0..0....0..1..0....0..1..0....0..1..0....4..5..1
..0..1..0....0..1..0....0..1..0....2..0..1....0..1..0....0..1..0....0..0..0
..0..1..0....0..1..0....2..0..1....0..1..0....0..1..0....3..0..1....1..1..0
CROSSREFS
Sequence in context: A209526 A208307 A208787 * A208472 A093943 A252437
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 29 2012
STATUS
approved

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Last modified February 24 22:04 EST 2024. Contains 370307 sequences. (Running on oeis4.)