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 A199358 Number of nX1 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and every element equal to one or two horizontal or vertical neighbors 2
 0, 0, 0, 0, 0, 0, 0, 1, 4, 6, 4, 1, 10, 45, 105, 105, 735, 1935, 2270, 1001, 8854, 30961, 50669, 32706, 268440, 834720, 1164240, 614040, 5334840, 17805870, 27047395, 15771356, 135370824, 441296296, 646979039, 359653541, 3137738964, 10425704337 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,9 COMMENTS Column 1 of A199363 LINKS R. H. Hardin, Table of n, a(n) for n = 1..121 EXAMPLE All solutions for n=10 ..0....0....0....0....0....0 ..0....0....0....0....0....0 ..0....0....0....1....1....1 ..1....1....1....1....1....1 ..1....1....1....2....1....1 ..2....1....2....2....2....2 ..2....2....2....2....2....2 ..2....2....3....3....3....2 ..3....3....3....3....3....3 ..3....3....3....3....3....3 CROSSREFS Sequence in context: A261638 A010670 A240444 * A131890 A062751 A135911 Adjacent sequences:  A199355 A199356 A199357 * A199359 A199360 A199361 KEYWORD nonn AUTHOR R. H. Hardin Nov 05 2011 STATUS approved

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Last modified January 23 04:16 EST 2020. Contains 331168 sequences. (Running on oeis4.)