A207576 Number of n X n 0..3 arrays avoiding the pattern z+1 z+1 z horizontally and z-1 z-1 z vertically

4, 256, 196916, 1970169608, 257884387013510, 442453214562156086168

Offset

1,1

Comments

Diagonal of A207582

Links

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

Example

Some solutions for n=4
..0..0..1..2....0..1..0..3....2..2..2..0....1..0..2..3....3..2..3..0
..0..3..3..0....2..2..2..2....3..2..2..0....2..1..1..1....1..1..1..1
..2..0..1..2....1..1..3..2....2..0..0..0....3..3..0..1....2..1..2..3
..1..1..1..1....0..3..3..0....1..2..3..2....0..0..3..3....0..1..2..0

Crossrefs

Sequence in context: A206789 A206961 A206569 * A209086 A207051 A207128

Adjacent sequences: A207573 A207574 A207575 * A207577 A207578 A207579

Keyword

nonn

Author

R. H. Hardin Feb 19 2012

Status

approved