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A198209 T(n,k)=Number of 2nX2k 0..3 arrays with values 0..3 introduced in row major order and each element unequal to exactly two horizontal and vertical neighbors 5
4, 43, 43, 658, 1765, 658, 11029, 50729, 50729, 11029, 189376, 1660672, 3603458, 1660672, 189376, 3272959, 56315642, 276030525, 276030525, 56315642, 3272959, 56665678, 1930887802, 21989253467, 51432469614, 21989253467, 1930887802 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.........4..........43...........658..........11029.........189376

........43........1765.........50729........1660672.......56315642

.......658.......50729.......3603458......276030525....21989253467

.....11029.....1660672.....276030525....51432469614.10120087499636

....189376....56315642...21989253467.10120087499636

...3272959..1930887802.1791994477631

..56665678.66941645630

.981535273

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..39

EXAMPLE

Some solutions for n=5 k=3

..0..1..0..0..1..0....0..1..0..0..1..0....0..1..0..0..1..0....0..1..0..0..1..0

..2..1..1..1..1..2....2..1..1..1..1..2....2..1..1..1..1..2....2..1..1..1..1..2

..2..0..0..0..0..2....2..0..0..0..0..2....2..0..0..0..0..2....2..0..0..0..0..2

..0..0..1..1..0..1....0..0..1..1..0..1....0..0..2..2..0..1....0..0..3..3..0..0

..3..3..1..1..0..1....2..2..1..1..0..1....1..1..2..2..0..1....1..1..3..3..1..1

..0..3..0..0..0..2....3..2..2..2..0..0....3..1..3..3..0..0....2..1..0..0..1..0

..0..3..0..1..1..2....3..0..0..2..2..2....3..1..3..3..1..1....2..1..0..0..1..0

..3..3..0..1..1..3....2..0..0..1..1..1....1..1..2..2..1..0....1..1..3..3..1..1

..1..1..0..0..0..3....2..1..1..1..2..2....0..0..2..2..1..0....0..0..3..3..0..0

..0..1..3..3..0..1....0..1..0..0..2..3....2..0..3..3..1..2....2..0..2..2..0..1

CROSSREFS

Sequence in context: A156479 A111829 A200000 * A220774 A296683 A297649

Adjacent sequences:  A198206 A198207 A198208 * A198210 A198211 A198212

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Oct 22 2011

STATUS

approved

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Last modified October 21 11:04 EDT 2018. Contains 316414 sequences. (Running on oeis4.)