A232421 Number of (7+1)X(n+1) 0..2 arrays with every element both >= and <= some horizontal, diagonal or antidiagonal neighbor

770747, 5408696699, 12924602609687, 45820119635323263, 183153958944323007479, 706140725462584654341029, 2693465102291782418303130499

Offset

1,1

Comments

Row 7 of A232414

Links

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

Example

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

Crossrefs

Sequence in context: A234167 A237573 A232123 * A226113 A151562 A023348

Adjacent sequences: A232418 A232419 A232420 * A232422 A232423 A232424

Keyword

nonn

Author

R. H. Hardin, Nov 23 2013

Status

approved