A183578 - OEIS

A183578

Half the number of n X 3 0..3 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors.

2, 78, 814, 9667, 110674, 1282814, 14823037, 171459557, 1982720806, 22929915669, 265174801858, 3066662593835, 35464903052433, 410139828611289, 4743130059530921, 54852719114258196, 634353415473617224

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 3 of A183584.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions with a(1,1)<=1 for 5 X 3

..0..0..0....1..0..0....0..0..2....1..0..0....0..0..3....0..1..1....1..0..1

..0..3..3....1..1..0....0..2..2....1..1..1....0..0..3....0..0..0....1..0..1

..1..0..0....0..0..2....2..1..2....3..0..0....3..3..3....2..2..0....1..0..0

..1..1..1....0..0..2....2..1..1....3..0..0....2..2..3....0..0..0....0..1..0

..0..0..1....0..1..1....1..1..1....3..0..0....2..2..2....0..1..1....0..1..0

CROSSREFS

Cf. A183584.

Sequence in context: A338588 A364696 A308373 * A184965 A157062 A008273

Adjacent sequences: A183575 A183576 A183577 * A183579 A183580 A183581

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 05 2011

STATUS

approved