A205238 Number of (n+1)X(n+1) 0..2 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in each of its horizontal and vertical neighbors

81, 4158, 515162, 144087952, 96890744524, 145542216126349, 555164681243665142

Offset

1,1

Comments

Diagonal of A205246

Links

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

Example

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

Crossrefs

Sequence in context: A237100 A245665 A016888 * A006312 A183962 A174698

Adjacent sequences: A205235 A205236 A205237 * A205239 A205240 A205241

Keyword

nonn

Author

R. H. Hardin Jan 24 2012

Status

approved