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

877, 151329962, 346279494967526, 4397499594659018513529, 200823740464350277512414467867

Offset

1,1

Comments

Row 7 of A208581

Links

Table of n, a(n) for n=1..5.

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

Adjacent sequences: A208584 A208585 A208586 * A208588 A208589 A208590

Keyword

nonn

Author

R. H. Hardin Feb 29 2012

Status

approved