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A198452 T(n,k)=Number of 2nX2k 0..2 arrays with values 0..2 introduced in row major order and each element unequal to exactly two horizontal and vertical neighbors 7

%I

%S 3,13,13,71,177,71,433,1399,1399,433,2763,14109,26704,14109,2763,

%T 17941,146187,421185,421185,146187,17941,117263,1532249,7302285,

%U 13048509,7302285,1532249,117263,768313,16411255,128955464,396482929,396482929

%N T(n,k)=Number of 2nX2k 0..2 arrays with values 0..2 introduced in row major order and each element unequal to exactly two horizontal and vertical neighbors

%C Table starts

%C .......3........13.........71.........433........2763.......17941.......117263

%C ......13.......177.......1399.......14109......146187.....1532249.....16411255

%C ......71......1399......26704......421185.....7302285...128955464...2298267371

%C .....433.....14109.....421185....13048509...396482929.12354617337.388054368497

%C ....2763....146187....7302285...396482929.22496409154

%C ...17941...1532249..128955464.12354617337

%C ..117263..16411255.2298267371

%C ..768313.176845253

%C .5038611

%H R. H. Hardin, <a href="/A198452/b198452.txt">Table of n, a(n) for n = 1..49</a>

%e Some solutions for n=5 k=3

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

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

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

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

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

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

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

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

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

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

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_ Oct 25 2011

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Last modified May 23 09:24 EDT 2022. Contains 353975 sequences. (Running on oeis4.)