A208470 Number of 5Xn nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors

52, 115975, 1366230232, 51074630353994, 4585512913250157737, 838156242834826375910795

Offset

1,1

Comments

Row 5 of A208466

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for n=4
..0..1..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..1..0....0..1..0..0....0..1..0..0....0..1..1..0....0..1..0..0
..0..0..0..0....0..1..0..0....2..0..1..0....0..0..0..0....0..0..1..0
..0..2..0..0....0..1..0..0....0..0..0..0....0..1..0..0....0..0..1..0
..0..0..1..0....0..0..1..0....0..1..0..0....0..1..0..0....0..0..0..0

Crossrefs

Sequence in context: A208585 A208464 A211252 * A070908 A198980 A198721

Adjacent sequences: A208467 A208468 A208469 * A208471 A208472 A208473

Keyword

nonn

Author

R. H. Hardin Feb 27 2012

Status

approved