A207213 Number of 7Xn 0..2 arrays avoiding the pattern z-1 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal

1440, 2073600, 1009600274, 500670359576, 261868042220093, 137715069370357544, 72904426459924759331

Offset

1,1

Comments

Row 7 of A207208

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A023102 A289633 A282330 * A207207 A206733 A207357

Adjacent sequences: A207210 A207211 A207212 * A207214 A207215 A207216

Keyword

nonn

Author

R. H. Hardin Feb 15 2012

Status

approved