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 A221507 T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without consecutive moves in the same direction 5
 0, 1, 0, 0, 9, 0, 1, 44, 64, 0, 0, 446, 664, 441, 0, 1, 3334, 31663, 12495, 3025, 0, 0, 27540, 730874, 2691211, 221614, 20736, 0, 1, 219070, 22664752, 223123842, 219689604, 4010052, 142129, 0, 0, 1766136, 617892584, 26917553016, 61691224718 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS Table starts .0......1........0...........1...........0...........1.........0...........1 .0......9.......44.........446........3334.......27540....219070.....1766136 .0.....64......664.......31663......730874....22664752.617892584.17782943460 .0....441....12495.....2691211...223123842.26917553016 .0...3025...221614...219689604.61691224718 .0..20736..4010052.18054912942 .0.142129.72195950 .0.974169 .0 LINKS R. H. Hardin, Table of n, a(n) for n = 1..48 EXAMPLE Some solutions for n=3 k=4 ..1..1..3..0....0..0..0..0....0..0..1..1....1..0..1..0....1..0..1..1 ..1..1..1..1....1..3..2..2....0..4..1..0....1..2..0..3....0..3..0..1 ..0..3..0..0....2..1..1..0....2..0..2..1....1..1..2..0....2..0..2..1 CROSSREFS Column 2 is A049684 Sequence in context: A199284 A189186 A221429 * A370347 A089481 A188593 Adjacent sequences: A221504 A221505 A221506 * A221508 A221509 A221510 KEYWORD nonn,tabl AUTHOR R. H. Hardin Jan 18 2013 STATUS approved

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Last modified April 17 21:01 EDT 2024. Contains 371767 sequences. (Running on oeis4.)