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 A199251 Number of nX3 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 no element equal to any horizontal or vertical neighbor 1
 1, 14, 114, 447, 16898, 311216, 2913528, 11312517, 551973865, 11307744507, 111458340272, 438326135133, 23492069994614, 506092203408916, 5117349646825383, 20296888647373122, 1141664017876511539 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 3 of A199256 LINKS R. H. Hardin, Table of n, a(n) for n = 1..28 EXAMPLE Some solutions for n=4 ..0..1..0....0..1..2....0..1..2....0..1..2....0..1..2....0..1..0....0..1..2 ..2..0..3....3..2..3....3..2..1....3..2..0....2..3..0....2..3..1....1..3..0 ..1..3..2....2..3..1....0..3..0....1..3..2....3..0..1....3..0..2....3..1..2 ..2..1..3....0..1..0....2..1..3....0..1..3....1..2..3....1..2..3....2..3..0 CROSSREFS Sequence in context: A007817 A044346 A044727 * A199196 A071573 A076429 Adjacent sequences:  A199248 A199249 A199250 * A199252 A199253 A199254 KEYWORD nonn AUTHOR R. H. Hardin Nov 04 2011 STATUS approved

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