A251275 Number of (n+1)X(n+1) 0..3 arrays with no 2X2 subblock having its maximum diagonal element less than its minimum antidiagonal element

230, 164800, 1497752279, 172919373209920, 253597772369472323328, 4724687679127024503784365440, 1118224116880857883546078105623321344, 3362121790823480902189703776276345356341787648

Offset

1,1

Comments

Diagonal of A251283

Links

R. H. Hardin, Table of n, a(n) for n = 1..9

Example

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

Crossrefs

Sequence in context: A231107 A231251 A051183 * A323321 A156742 A031965

Adjacent sequences: A251272 A251273 A251274 * A251276 A251277 A251278

Keyword

nonn

Author

R. H. Hardin, Dec 01 2014

Status

approved