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A217637 T(n,k)=Number of nXk arrays of the minimum value of corresponding elements and their horizontal and vertical neighbors in a random 0..1 nXk array 8

%I #16 Oct 08 2020 19:21:28

%S 2,2,2,4,6,4,6,16,16,6,10,38,66,38,10,16,98,244,244,98,16,26,244,968,

%T 1418,968,244,26,42,614,3726,8706,8706,3726,614,42,68,1542,14520,

%U 52120,83074,52120,14520,1542,68,110,3872,56352,315378,773348,773348,315378

%N T(n,k)=Number of nXk arrays of the minimum value of corresponding elements and their horizontal and vertical neighbors in a random 0..1 nXk array

%C Number of maximal independent sets in the graph P_2 X P_n X P_k. - _Andrew Howroyd_, Jun 10 2017

%H R. H. Hardin, <a href="/A217637/b217637.txt">Table of n, a(n) for n = 1..220</a>

%H MacKenzie Carr, Christina M. Mynhardt, Ortrud R. Oellermann, <a href="https://arxiv.org/abs/2008.02781">Enumerating the Digitally Convex Sets of Powers of Cycles and Cartesian Products of Paths and Complete Graphs</a>, arXiv:2008.02781 [math.CO], 2020.

%H R. Euler, P. Oleksik, Z. Skupien, <a href="http://dx.doi.org/10.7151/dmgt.1707">Counting Maximal Distance-Independent Sets in Grid Graphs</a>, Discussiones Mathematicae Graph Theory. Volume 33, Issue 3, Pages 531-557, ISSN (Print) 2083-5892, July 2013; see <a href="http://www.degruyter.com/view/j/dmgt.2013.33.issue-3/dmgt.1707/dmgt.1707.xml">also</a>.

%e Table starts

%e ...2.....2........4..........6...........10..............16................26

%e ...2.....6.......16.........38...........98.............244...............614

%e ...4....16.......66........244..........968............3726.............14520

%e ...6....38......244.......1418.........8706...........52120............315378

%e ..10....98......968.......8706........83074..........773348...........7272142

%e ..16...244.....3726......52120.......773348........11181454.........163361868

%e ..26...614....14520.....315378......7272142.......163361868........3709621842

%e ..42..1542....56352....1900838.....68138974......2378097084.......83923710538

%e ..68..3872...218978...11472148....639248556.....34661572702.....1901055652804

%e .110..9726...850620...69210290...5994907930....505010822224....43046530809006

%e .178.24426..3304624..417586442..56226693158...7358779655656...974841850791586

%e .288.61348.12837742.2519466108.527340415924.107224919634686.22075731493018104

%e ...

%e Some solutions for n=3 k=4

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

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

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

%Y Columns 1-3 are A006355(n+1), A217631, A217632.

%Y Cf. A197054.

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_, Oct 09 2012

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Last modified April 18 18:58 EDT 2024. Contains 371781 sequences. (Running on oeis4.)