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 A221773 T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, without move-in move-out left turns 5
 1, 3, 3, 8, 27, 8, 21, 240, 240, 21, 55, 2127, 7371, 2127, 55, 144, 18828, 225873, 225873, 18828, 144, 377, 166581, 6916881, 23965217, 6916881, 166581, 377, 987, 1473549, 211747695, 2541024755, 2541024755, 211747695, 1473549, 987, 2584, 13033908 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts ....1.........3............8.............21..............55.............144 ....3........27..........240...........2127...........18828..........166581 ....8.......240.........7371.........225873.........6916881.......211747695 ...21......2127.......225873.......23965217......2541024755....269350655878 ...55.....18828......6916881.....2541024755....932759231192.342291992210642 ..144....166581....211747695...269350655878.342291992210642 ..377...1473549...6481445220.28548644230368 ..987..13033908.198382906386 .2584.115285587 .6765 LINKS R. H. Hardin, Table of n, a(n) for n = 1..60 EXAMPLE Some solutions for n=3 k=4 ..1..0..1..1....0..0..2..0....1..0..1..1....1..0..1..1....1..1..1..2 ..1..2..4..0....3..0..3..2....1..3..2..1....1..2..2..3....1..0..1..2 ..1..0..1..0....1..0..1..0....1..0..1..0....0..0..1..0....1..0..0..2 CROSSREFS Column 1 is A001906 Sequence in context: A202536 A038068 A267952 * A101126 A221001 A222093 Adjacent sequences: A221770 A221771 A221772 * A221774 A221775 A221776 KEYWORD nonn,tabl AUTHOR R. H. Hardin Jan 25 2013 STATUS approved

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Last modified June 21 13:19 EDT 2024. Contains 373544 sequences. (Running on oeis4.)