A203548 Number of nX6 0..4 arrays with every nonzero element less than or equal to some NW, E or S neighbor

1, 504464, 3251156731, 9344922234283, 24753202810365029, 72614149907378126398, 218138773893328980719919, 645872523268889732997339866, 1902991992336783127520393083480

Offset

1,2

Comments

Column 6 of A203550

Links

R. H. Hardin, Table of n, a(n) for n = 1..187

Example

Some solutions for n=5
..2..4..3..3..2..2....1..2..2..1..2..0....3..0..3..3..0..1....4..1..0..4..3..4
..3..4..1..3..2..3....0..1..4..0..2..3....3..3..1..4..2..4....4..4..1..4..0..4
..2..4..2..0..4..3....1..4..4..1..4..3....3..2..1..4..3..4....4..1..1..4..3..4
..1..4..2..2..4..3....1..2..4..3..4..3....3..0..4..4..4..4....4..4..1..4..4..4
..2..4..4..2..4..4....4..4..4..4..4..4....4..4..4..4..1..4....3..3..4..2..2..4

Crossrefs

Sequence in context: A227110 A187313 A183789 * A195525 A124945 A205167

Adjacent sequences: A203545 A203546 A203547 * A203549 A203550 A203551

Keyword

nonn

Author

R. H. Hardin Jan 02 2012

Status

approved