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 A221782 Number of 3Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out left turns 1
 1, 184, 7676, 311500, 12449782, 496125037, 19763197787, 787085360643, 31344203790093, 1248188259617209, 49704848595150246, 1979319928404980888, 78819337675566218873, 3138697184284703490208, 124987334716559797042649 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 3 of A221780 LINKS R. H. Hardin, Table of n, a(n) for n = 1..46 EXAMPLE Some solutions for n=3 ..0..3..1....1..1..1....1..2..2....2..0..0....0..0..0....0..3..2....2..0..0 ..1..1..2....0..1..0....0..0..0....0..4..0....1..2..1....0..3..0....2..3..0 ..1..0..0....1..4..0....0..3..1....1..2..0....3..2..0....1..0..0....2..0..0 CROSSREFS Sequence in context: A235250 A221931 A223117 * A296780 A035831 A094631 Adjacent sequences: A221779 A221780 A221781 * A221783 A221784 A221785 KEYWORD nonn AUTHOR R. H. Hardin Jan 25 2013 STATUS approved

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Last modified December 10 04:38 EST 2023. Contains 367699 sequences. (Running on oeis4.)