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 A221509 Number of 3Xn arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without consecutive moves in the same direction 0
 0, 64, 664, 31663, 730874, 22664752, 617892584, 17782943460, 499912745268, 14194927933912, 401323009766448, 11367289765226164, 321716709992052606, 9108319376609834007, 257833317722010551358, 7299063007433073641077 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 3 of A221507 LINKS EXAMPLE Some solutions for n=3 ..0..3..1....1..4..0....1..1..1....0..0..0....0..3..0....0..3..0....1..1..0 ..0..3..2....0..1..2....0..1..1....1..2..2....0..0..2....2..3..1....2..4..0 ..0..0..0....0..1..0....0..4..0....0..4..0....1..3..0....0..0..0....0..1..0 CROSSREFS Sequence in context: A297666 A269586 A269080 * A283337 A187620 A119287 Adjacent sequences:  A221506 A221507 A221508 * A221510 A221511 A221512 KEYWORD nonn AUTHOR R. H. Hardin Jan 18 2013 STATUS approved

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Last modified August 15 17:39 EDT 2022. Contains 356148 sequences. (Running on oeis4.)