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A202742 T(n,k)=Number of nXk 0..1 arrays with row sums equal and column sums unequal to adjacent columns 13

%I #5 Mar 31 2012 12:36:51

%S 2,2,2,2,2,2,2,6,8,2,2,22,38,10,2,2,54,140,86,32,2,2,102,638,838,282,

%T 44,2,2,214,3032,6870,5092,1074,128,2,2,582,14258,62398,75302,29680,

%U 2802,186,2,2,1590,70136,613950,1375912,827502,183220,8694,512,2,2,3814

%N T(n,k)=Number of nXk 0..1 arrays with row sums equal and column sums unequal to adjacent columns

%C Table starts

%C .2...2.....2........2...........2............2.............2.............2

%C .2...2.....6.......22..........54..........102...........214...........582

%C .2...8....38......140.........638.........3032.........14258.........70136

%C .2..10....86......838........6870........62398........613950.......6018166

%C .2..32...282.....5092.......75302......1375912......24620522.....472929952

%C .2..44..1074....29680......827502.....27842760.....967878370...35772388788

%C .2.128..2802...183220.....8870150....578826040...37121438930.2639009446600

%C .2.186..8694..1061814....93402390..11600238174.1401569558590

%C .2.512.30170..6630116...969837470.239443637912

%C .2.772.82286.39048472.10133577294

%H R. H. Hardin, <a href="/A202742/b202742.txt">Table of n, a(n) for n = 1..110</a>

%e Some solutions for n=5 k=3

%e ..1..0..1....1..1..0....0..1..0....1..0..0....0..0..1....1..0..1....1..0..0

%e ..1..1..0....1..0..1....0..1..0....0..0..1....0..0..1....1..0..1....1..0..0

%e ..1..1..0....1..1..0....1..0..0....1..0..0....0..0..1....1..1..0....0..1..0

%e ..1..0..1....1..0..1....0..1..0....1..0..0....0..1..0....1..0..1....1..0..0

%e ..1..1..0....1..0..1....0..1..0....0..0..1....0..0..1....0..1..1....0..1..0

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_ Dec 23 2011

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Last modified April 24 14:23 EDT 2024. Contains 371960 sequences. (Running on oeis4.)