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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
3, 13, 13, 71, 177, 71, 433, 1399, 1399, 433, 2763, 14109, 26704, 14109, 2763, 17941, 146187, 421185, 421185, 146187, 17941, 117263, 1532249, 7302285, 13048509, 7302285, 1532249, 117263, 768313, 16411255, 128955464, 396482929, 396482929
OFFSET
1,1
COMMENTS
Table starts
.......3........13.........71.........433........2763.......17941.......117263
......13.......177.......1399.......14109......146187.....1532249.....16411255
......71......1399......26704......421185.....7302285...128955464...2298267371
.....433.....14109.....421185....13048509...396482929.12354617337.388054368497
....2763....146187....7302285...396482929.22496409154
...17941...1532249..128955464.12354617337
..117263..16411255.2298267371
..768313.176845253
.5038611
LINKS
EXAMPLE
Some solutions for n=5 k=3
..0..1..0..1..0..1....0..1..0..1..0..1....0..1..0..1..0..1....0..1..0..1..0..1
..1..1..0..1..0..0....1..1..0..1..0..2....1..1..0..1..0..0....2..1..0..1..0..0
..2..2..0..1..1..1....0..0..0..1..0..2....0..0..0..1..1..1....2..1..0..1..1..1
..0..2..0..0..0..0....1..1..1..1..0..1....2..2..2..0..0..2....1..1..0..2..2..2
..0..2..2..2..2..2....0..0..0..0..0..1....0..0..2..0..0..2....0..0..0..2..0..0
..1..0..0..0..0..1....1..1..1..1..1..0....1..0..2..1..1..0....2..2..2..2..0..1
..1..0..2..2..0..1....0..0..0..0..1..0....1..0..2..1..1..0....0..0..0..0..0..1
..2..0..2..2..0..2....2..2..2..0..1..1....0..0..2..0..0..2....2..2..2..2..2..2
..2..0..0..0..0..2....1..1..2..0..2..2....2..2..2..0..0..2....1..1..0..0..0..0
..0..2..2..1..1..0....2..1..2..0..2..1....0..1..1..2..2..1....0..1..0..1..1..2
CROSSREFS
Sequence in context: A137947 A168437 A076747 * A286190 A224693 A043055
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Oct 25 2011
STATUS
approved