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 A221724 Number of 3Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor 1
 1, 306, 11733, 544757, 24019048, 1068474439, 47427140282, 2106033021852, 93510052180466, 4152013229849883, 184355733843153070, 8185679969358665185, 363456710563714005229, 16138033279951566079150, 716553304870897490539683 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 3 of A221723 LINKS R. H. Hardin, Table of n, a(n) for n = 1..19 EXAMPLE Some solutions for n=3 ..1..0..0....2..2..0....1..2..2....1..1..0....2..3..0....0..3..1....0..5..0 ..0..1..1....0..4..1....0..0..0....1..1..2....0..0..0....0..2..2....0..0..1 ..3..3..0....0..0..0....2..1..1....2..1..0....0..4..0....1..0..0....0..1..2 CROSSREFS Sequence in context: A223073 A064257 A221854 * A023908 A035843 A128477 Adjacent sequences: A221721 A221722 A221723 * A221725 A221726 A221727 KEYWORD nonn AUTHOR R. H. Hardin Jan 22 2013 STATUS approved

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Last modified April 24 04:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)