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A222690 T(n,k)=Number of nXk 0..2 arrays with exactly floor(nXk/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order 14

%I #4 Feb 28 2013 17:03:33

%S 1,0,0,0,3,0,3,4,8,0,4,18,32,50,0,8,56,220,420,216,0,10,237,664,3189,

%T 2050,1120,0,50,784,7248,29770,47696,32296,5440,0,66,3218,25642,

%U 288829,419562,723244,159672,27576,0,216,11152,298371,3056797,12765040,20259516

%N T(n,k)=Number of nXk 0..2 arrays with exactly floor(nXk/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order

%C Table starts

%C .1........0...........0..............3................4...................8

%C .0........3...........4.............18...............56.................237

%C .0........8..........32............220..............664................7248

%C .0.......50.........420...........3189............29770..............288829

%C .0......216........2050..........47696...........419562............12765040

%C .0.....1120.......32296.........723244.........20259516...........589802909

%C .0.....5440......159672.......11082863........301760538.........27752564898

%C .0....27576.....2593768......171281610......14776550335.......1319414370191

%C .0...138560....13108760.....2665243912.....223789472088......63167849881088

%C .0...704880...215573760....41702927217...11086737070564....3040537134742112

%C .0..3590400..1103125848...655500979620..169432535832409..146998128651407720

%C .0.18382208.18291819408.10342682216196.8466158066084383.7133080659964442596

%H R. H. Hardin, <a href="/A222690/b222690.txt">Table of n, a(n) for n = 1..159</a>

%e Some solutions for n=3 k=4

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

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

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

%Y Row 1 is A222395

%K nonn,tabl

%O 1,5

%A _R. H. Hardin_ Feb 28 2013

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Last modified April 18 20:21 EDT 2024. Contains 371781 sequences. (Running on oeis4.)