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A202931 T(n,k)=Number of nXk 0..2 arrays with adjacent row and column sums unequal 7

%I #5 Mar 31 2012 12:36:53

%S 3,6,6,12,52,12,24,352,352,24,48,2444,8460,2444,48,96,17508,194636,

%T 194636,17508,96,192,124340,4439916,14394092,4439916,124340,192,384,

%U 872940,100236532,1032147416,1032147416,100236532,872940,384,768,6112832

%N T(n,k)=Number of nXk 0..2 arrays with adjacent row and column sums unequal

%C Table starts

%C ....3........6..........12............24.............48.............96

%C ....6.......52.........352..........2444..........17508.........124340

%C ...12......352........8460........194636........4439916......100236532

%C ...24.....2444......194636......14394092.....1032147416....72961197604

%C ...48....17508.....4439916....1032147416...231197740500.50721408178292

%C ...96...124340...100236532...72961197604.50721408178292

%C ..192...872940..2247406834.5108912536716

%C ..384..6112832.50175952564

%C ..768.42822036

%C .1536

%H R. H. Hardin, <a href="/A202931/b202931.txt">Table of n, a(n) for n = 1..60</a>

%e Some solutions for n=4 k=3

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

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

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

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

%Y Diagonal is A202649

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_ Dec 26 2011

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)