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 A221890 T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without 2-loops or left turns 7
 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 37, 0, 0, 0, 0, 169, 202, 90, 0, 0, 0, 811, 2722, 4137, 204, 0, 0, 0, 3878, 31881, 154458, 56313, 1297, 0, 0, 0, 18502, 416630, 5488703, 5408074, 760578, 4608, 0, 0, 0, 88302, 5496803, 201212852, 537483861, 216702488, 10743570 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,8 COMMENTS Table starts .0.0.....0........0.........0.........0...........0..........0........0......0 .0.0.....8.......37.......169.......811........3878......18502....88302.421463 .0.0.....0......202......2722.....31881......416630....5496803.71900708 .0.0....90.....4137....154458...5488703...201212852.7816225089 .0.0...204....56313...5408074.537483861.57983867320 .0.0..1297...760578.216702488 .0.0..4608.10743570 .0.0.23159 .0.0 .0 LINKS R. H. Hardin, Table of n, a(n) for n = 1..60 EXAMPLE Some solutions for n=4 k=4 ..1..3..1..0....0..1..2..1....0..2..2..1....0..2..1..1....0..1..1..0 ..0..0..3..1....0..2..2..0....0..0..2..0....1..1..2..0....1..2..1..1 ..0..2..0..0....1..2..0..1....0..3..2..1....1..2..0..0....1..3..2..0 ..1..1..2..1....0..1..3..0....0..1..2..0....0..2..3..0....0..1..2..0 CROSSREFS Sequence in context: A028608 A028600 A299165 * A047758 A186980 A171918 Adjacent sequences:  A221887 A221888 A221889 * A221891 A221892 A221893 KEYWORD nonn,tabl AUTHOR R. H. Hardin Jan 30 2013 STATUS approved

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Last modified August 8 06:27 EDT 2020. Contains 336290 sequences. (Running on oeis4.)