A207352 Number of n X n 0..2 arrays avoiding the pattern z+1 z+1 z horizontally and z-1 z-1 z vertically

3, 81, 12468, 12218660, 76964941511, 3146529377348628, 839863084228054288788, 1460525611014150485510439164

Offset

1,1

Comments

Diagonal of A207358

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A206856 A206951 A206726 * A207983 A207195 A207215

Adjacent sequences: A207349 A207350 A207351 * A207353 A207354 A207355

Keyword

nonn

Author

R. H. Hardin Feb 17 2012

Status

approved