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 A199258 Number of 3nX2 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to exactly one horizontal or vertical neighbor 1
 3, 36, 449, 6024, 83890, 1203424, 17634348, 262690636, 3964097574, 60448089272, 929736185578, 14403575178424, 224514368663504, 3518109050510528, 55381725681044520, 875329086340050012, 13884232495508832254 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 3n elements of column 2 of A199261 LINKS R. H. Hardin, Table of n, a(n) for n = 1..99 EXAMPLE Some solutions for n=3 ..0..0....0..0....0..0....0..1....0..0....0..1....0..0....0..0....0..1....0..0 ..1..1....1..1....1..1....0..1....1..1....0..1....1..2....1..1....0..1....1..1 ..0..2....0..0....2..2....2..2....0..0....2..2....1..2....2..0....1..2....2..2 ..0..2....2..2....1..1....0..1....2..2....0..0....0..0....2..0....1..2....1..1 ..2..1....1..1....0..2....0..1....1..1....2..2....2..2....1..1....2..0....0..0 ..2..1....2..2....0..2....2..0....2..2....1..1....1..1....2..0....2..0....2..2 ..1..0....0..0....1..1....2..0....1..1....0..0....2..2....2..0....1..1....0..0 ..1..0....2..1....2..2....1..2....2..0....1..2....0..0....1..1....2..2....1..1 ..2..2....2..1....0..0....1..2....2..0....1..2....1..1....2..2....0..0....2..2 CROSSREFS Sequence in context: A055303 A068177 A099670 * A203493 A224256 A223912 Adjacent sequences:  A199255 A199256 A199257 * A199259 A199260 A199261 KEYWORD nonn AUTHOR R. H. Hardin Nov 04 2011 STATUS approved

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