A254475 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal minimum nondecreasing horizontally and vertically

512, 11293, 211579, 2539310, 24234594, 205535751, 1553637600, 8600345305, 55445966383, 490042680771, 2850234052306, 20174333834904

Offset

1,1

Comments

Diagonal of A254483

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Sequence in context: A257182 A288776 A200844 * A254768 A254504 A253812

Adjacent sequences: A254472 A254473 A254474 * A254476 A254477 A254478

Keyword

nonn

Author

R. H. Hardin, Jan 31 2015

Status

approved