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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.)