A253525 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock antidiagonal maximum minus diagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal minimum nondecreasing vertically

81, 2722, 22418, 182493, 745281, 4292539, 14461240, 74067255, 239552591, 1153148632, 3757984096, 17291330720, 57734458801

Offset

1,1

Comments

Diagonal of A253533

Links

Table of n, a(n) for n=1..13.

Example

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

Crossrefs

Sequence in context: A297084 A018223 A206660 * A253741 A253516 A038398

Adjacent sequences: A253522 A253523 A253524 * A253526 A253527 A253528

Keyword

nonn

Author

R. H. Hardin, Jan 03 2015

Status

approved