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 A207221 T(n,k)=Number of nXk 0..2 arrays avoiding the pattern z z+1 z in any row or column 7

%I

%S 3,9,9,25,81,25,69,625,625,69,191,4761,12534,4761,191,529,36481,

%T 247163,247163,36481,529,1465,279841,4916282,12584703,4916282,279841,

%U 1465,4057,2146225,97935886,647820815,647820815,97935886,2146225,4057,11235

%N T(n,k)=Number of nXk 0..2 arrays avoiding the pattern z z+1 z in any row or column

%C Table starts

%C ....3........9..........25.............69................191

%C ....9.......81.........625...........4761..............36481

%C ...25......625.......12534.........247163............4916282

%C ...69.....4761......247163.......12584703..........647820815

%C ..191....36481.....4916282......647820815........86510224720

%C ..529...279841....97935886....33403462497.....11574609426324

%C .1465..2146225..1950327875..1721695415743...1547869995556777

%C .4057.16459249.38835489653.88730578258613.206971107381598775

%H R. H. Hardin, <a href="/A207221/b207221.txt">Table of n, a(n) for n = 1..143</a>

%e Some solutions for n=4 k=3

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

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

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

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

%Y Column 1 is A098182(n+1)

%Y Column 2 is A206857

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_ Feb 16 2012

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Last modified March 22 22:02 EDT 2023. Contains 361434 sequences. (Running on oeis4.)