A203258 Number of nX4 0..7 arrays with every nonzero element less than or equal to some NW, E or S neighbor

1, 62098, 107936298, 93604950539, 71719101346406, 60474221730991631, 52958564655658086303, 45410792047891744041176, 38530218942139546908094441, 32829107055421437877966650852, 28053947070810100019715427763000

Offset

1,2

Comments

Column 4 of A203262

Links

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

Example

Some solutions for n=4
..6..0..1..0....6..7..4..1....0..0..7..1....6..4..5..0....1..2..2..2
..7..0..5..1....0..7..6..1....2..4..7..6....6..0..5..5....1..6..4..2
..7..0..5..3....4..7..6..3....1..4..7..2....7..0..6..5....1..6..4..0
..7..7..5..5....5..7..7..1....0..3..7..7....7..7..6..6....4..6..6..0

Crossrefs

Sequence in context: A128879 A234149 A214147 * A089009 A093791 A083488

Adjacent sequences: A203255 A203256 A203257 * A203259 A203260 A203261

Keyword

nonn

Author

R. H. Hardin Dec 30 2011

Status

approved