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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

%I

%S 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,

%T 0,0,0,3878,31881,154458,56313,1297,0,0,0,18502,416630,5488703,

%U 5408074,760578,4608,0,0,0,88302,5496803,201212852,537483861,216702488,10743570

%N 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

%C Table starts

%C .0.0.....0........0.........0.........0...........0..........0........0......0

%C .0.0.....8.......37.......169.......811........3878......18502....88302.421463

%C .0.0.....0......202......2722.....31881......416630....5496803.71900708

%C .0.0....90.....4137....154458...5488703...201212852.7816225089

%C .0.0...204....56313...5408074.537483861.57983867320

%C .0.0..1297...760578.216702488

%C .0.0..4608.10743570

%C .0.0.23159

%C .0.0

%C .0

%H R. H. Hardin, <a href="/A221890/b221890.txt">Table of n, a(n) for n = 1..60</a>

%e Some solutions for n=4 k=4

%e ..1..3..1..0....0..1..2..1....0..2..2..1....0..2..1..1....0..1..1..0

%e ..0..0..3..1....0..2..2..0....0..0..2..0....1..1..2..0....1..2..1..1

%e ..0..2..0..0....1..2..0..1....0..3..2..1....1..2..0..0....1..3..2..0

%e ..1..1..2..1....0..1..3..0....0..1..2..0....0..2..3..0....0..1..2..0

%K nonn,tabl

%O 1,8

%A _R. H. Hardin_ Jan 30 2013

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Last modified October 1 13:38 EDT 2022. Contains 357149 sequences. (Running on oeis4.)