A232407 Number of (n+1)X(n+1) 0..2 arrays with every element both >= and <= some horizontal, diagonal or antidiagonal neighbor

15, 2689, 2189991, 16776955943, 1137726954093673, 615510832230066725429, 2693465102291782418303130499

Offset

1,1

Comments

Diagonal of A232414

Links

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

Example

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

Crossrefs

Sequence in context: A126678 A340185 A208197 * A208404 A208411 A249965

Adjacent sequences: A232404 A232405 A232406 * A232408 A232409 A232410

Keyword

nonn

Author

R. H. Hardin, Nov 23 2013

Status

approved