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A206987 T(n,k)=Number of nXk 0..1 arrays avoiding the patterns 0 1 0 or 1 0 1 in any row, column, diagonal or antidiagonal 8

%I #5 Mar 31 2012 12:37:14

%S 2,4,4,6,16,6,10,36,36,10,16,100,58,100,16,26,256,158,158,256,26,42,

%T 676,420,556,420,676,42,68,1764,1066,1866,1866,1066,1764,68,110,4624,

%U 2754,5804,7500,5804,2754,4624,110,178,12100,7140,18528,27762,27762,18528

%N T(n,k)=Number of nXk 0..1 arrays avoiding the patterns 0 1 0 or 1 0 1 in any row, column, diagonal or antidiagonal

%C Table starts

%C ..2....4....6....10.....16......26.......42........68.......110........178

%C ..4...16...36...100....256.....676.....1764......4624.....12100......31684

%C ..6...36...58...158....420....1066.....2754......7140.....18430......47602

%C .10..100..158...556...1866....5804....18528.....59888....191484.....612874

%C .16..256..420..1866...7500...27762...106110....413526...1583234....6065840

%C .26..676.1066..5804..27762..119224...539576...2511348..11347860...51289536

%C .42.1764.2754.18528.106110..539576..2926752..16410772..88554260..477698908

%C .68.4624.7140.59888.413526.2511348.16410772.111202694.721243184.4677018224

%H R. H. Hardin, <a href="/A206987/b206987.txt">Table of n, a(n) for n = 1..420</a>

%e Some solutions for n=4 k=3

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

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

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

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

%Y Column 1 is A006355(n+2)

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_ Feb 14 2012

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)