A183585 1/24 the number of (n+1) X (n+1) 0..3 arrays with every 2 X 2 subblock containing exactly three distinct values.

6, 1243, 1427084, 9207834547, 332948364816764, 67504953898839080670

Offset

1,1

Comments

Diagonal of A183594.

Links

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

Example

Some solutions with a(1,1)=0 for 3 X 3
..0..1..0....0..2..3....0..2..2....0..1..0....0..1..2....0..2..0....0..3..1
..0..2..1....1..2..1....3..0..3....1..2..1....2..0..0....2..3..3....1..1..0
..3..3..3....0..0..2....2..2..0....0..2..3....0..3..2....1..1..2....0..3..1

Crossrefs

Cf. A183594.

Sequence in context: A131675 A263437 A001324 * A060706 A052278 A264103

Adjacent sequences: A183582 A183583 A183584 * A183586 A183587 A183588

Keyword

nonn

Author

R. H. Hardin, Jan 05 2011

Status

approved