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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. 1
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: A124456 A338588 A308373 * A184965 A157062 A008273

Adjacent sequences: A183575 A183576 A183577 * A183579 A183580 A183581

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 05 2011

STATUS

approved

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Last modified November 27 09:16 EST 2022. Contains 358367 sequences. (Running on oeis4.)