A253516 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically

81, 2724, 30013, 162815, 673229, 2662626, 10168992, 38531995, 145820265, 550386072, 2065878028

Offset

1,1

Comments

Diagonal of A253524

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Sequence in context: A206660 A253525 A253741 * A038398 A205902 A295252

Adjacent sequences: A253513 A253514 A253515 * A253517 A253518 A253519

Keyword

nonn

Author

R. H. Hardin, Jan 03 2015

Status

approved