A203546 Number of nX4 0..4 arrays with every nonzero element less than or equal to some NW, E or S neighbor

1, 4773, 1525965, 276550270, 48904258294, 9344922234283, 1791660443900385, 338602574128472532, 63976297551499117500, 12121902798540810205780, 2296828698552089841696914, 434962374988494300152555897

Offset

1,2

Comments

Column 4 of A203550

Links

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

Example

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

Crossrefs

Sequence in context: A125949 A237214 A204727 * A189183 A237095 A138087

Adjacent sequences: A203543 A203544 A203545 * A203547 A203548 A203549

Keyword

nonn

Author

R. H. Hardin Jan 02 2012

Status

approved