A203384 Number of nX3 0..6 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors

1, 49, 2422, 65653, 1644254, 50848495, 1678700434, 53072796241, 1649245811476, 51903280283513, 1647521450906196, 52245121787738051, 1654347109122722606, 52425103603449132267, 1662926668505201957635, 52761390157082419940463

Offset

1,2

Comments

Column 3 of A203389

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..2..2..0....4..4..0....3..4..4....1..3..3....2..5..5....3..3..0....2..3..3
..5..5..4....4..4..0....4..4..4....6..6..4....4..5..5....4..4..3....2..3..3
..5..5..4....2..3..3....4..2..4....6..6..4....6..6..1....5..5..3....1..5..5
..0..4..4....0..3..3....4..4..4....0..1..1....6..6..0....5..5..2....0..5..5

Crossrefs

Sequence in context: A120999 A087752 A069741 * A099367 A307811 A123841

Adjacent sequences: A203381 A203382 A203383 * A203385 A203386 A203387

Keyword

nonn

Author

R. H. Hardin Jan 01 2012

Status

approved