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 A220940 Number of nX3 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor 1
 2, 208, 7551, 291080, 11115933, 424939090, 16241930112, 620799451653, 23728084357764, 906930211627870, 34664497553698238, 1324939111423377826, 50641541794670836181, 1935610258239045700193, 73982484134692519016233 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A220943 LINKS R. H. Hardin, Table of n, a(n) for n = 1..21 EXAMPLE Some solutions for n=3 ..0..0..0....0..1..1....2..2..0....0..2..0....2..1..1....2..1..0....0..3..2 ..3..2..2....1..1..0....0..4..1....1..0..1....0..0..1....0..1..3....0..1..1 ..1..0..1....3..2..0....0..0..0....3..2..0....1..3..0....1..0..1....0..2..0 CROSSREFS Sequence in context: A238819 A110899 A281126 * A012600 A157479 A355904 Adjacent sequences: A220937 A220938 A220939 * A220941 A220942 A220943 KEYWORD nonn AUTHOR R. H. Hardin Dec 25 2012 STATUS approved

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Last modified January 31 15:11 EST 2023. Contains 359976 sequences. (Running on oeis4.)