A203502 Number of nX4 0..6 arrays with every nonzero element less than or equal to some NW, E or S neighbor

1, 29701, 31795165, 17549687172, 8828365834694, 4878810545594780, 2766231303166191786, 1536803068353977319009, 848104681813384557202316, 470048824818856993446144263, 260982207064173186292604340629

Offset

1,2

Comments

Column 4 of A203506

Links

R. H. Hardin, Table of n, a(n) for n = 1..149

Example

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

Crossrefs

Sequence in context: A236734 A236317 A204601 * A228544 A206203 A204283

Adjacent sequences: A203499 A203500 A203501 * A203503 A203504 A203505

Keyword

nonn

Author

R. H. Hardin Jan 02 2012

Status

approved