A250496 Number of (n+2)X(n+2) 0..1 arrays with nondecreasing medians of every three consecutive values in every row and column

512, 23096, 2191444, 495646476, 186246385700, 126911840548334, 172756072994467720

Offset

1,1

Comments

Diagonal of A250504

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A254353 A253793 A253756 * A254160 A254450 A254484

Adjacent sequences: A250493 A250494 A250495 * A250497 A250498 A250499

Keyword

nonn

Author

R. H. Hardin, Nov 24 2014

Status

approved