A254450 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally and vertically

512, 26380, 2085712, 275772848, 71814202464, 37859718002056, 41728495959588032, 96370792918403418032, 471658574277826549969856, 4899488261874299641047185592, 107824890536438862557050692197760

Offset

1,1

Comments

Diagonal of A254457

Links

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

Example

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

Crossrefs

Sequence in context: A253756 A250496 A254160 * A254484 A253864 A308815

Adjacent sequences: A254447 A254448 A254449 * A254451 A254452 A254453

Keyword

nonn

Author

R. H. Hardin, Jan 30 2015

Status

approved