A253756 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal median minus antidiagonal median nondecreasing horizontally and vertically

512, 23096, 1622944, 259418152, 84039781656, 58500640474944, 84156841519162348, 250063157421982076180, 1545740524382351294569364, 19818474670170537027103516398, 527481839143365201432947246654224

Offset

1,1

Comments

Diagonal of A253764

Links

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

Example

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

Crossrefs

Sequence in context: A264108 A254353 A253793 * A250496 A254160 A254450

Adjacent sequences: A253753 A253754 A253755 * A253757 A253758 A253759

Keyword

nonn

Author

R. H. Hardin, Jan 11 2015

Status

approved