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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 (list; table; graph; refs; listen; history; text; internal format)
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

R. H. Hardin, Table of n, a(n) for n = 1..49

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

Adjacent sequences:  A198449 A198450 A198451 * A198453 A198454 A198455

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Oct 25 2011

STATUS

approved

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Last modified January 24 08:31 EST 2022. Contains 350534 sequences. (Running on oeis4.)