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A199647 T(n,k)=Number of nXk 0..2 arrays with values 0..2 introduced in row major order and each element equal to one or two horizontal and vertical neighbors 8
0, 1, 1, 1, 3, 1, 2, 13, 13, 2, 3, 60, 112, 60, 3, 6, 288, 1265, 1265, 288, 6, 11, 1384, 12748, 29229, 12748, 1384, 11, 22, 6628, 134748, 658770, 658770, 134748, 6628, 22, 43, 31772, 1396083, 15066222, 32177372, 15066222, 1396083, 31772, 43, 86, 152304 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

Table starts

..0......1..........1.............2................3..................6

..1......3.........13............60..............288...............1384

..1.....13........112..........1265............12748.............134748

..2.....60.......1265.........29229...........658770...........15066222

..3....288......12748........658770.........32177372.........1614250077

..6...1384.....134748......15066222.......1614250077.......176701683386

.11...6628....1396083.....342328663......80053957248.....19161971644783

.22..31772...14584050....7797114144....3988024796446...2085499380111100

.43.152304..151837464..177447181083..198328767139736.226676302441401393

.86.730036.1582988477.4039488090307.9869645990489747

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..112

EXAMPLE

Some solutions for n=5 k=3

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

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

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

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

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

CROSSREFS

Column 1 is A005578(n-2)

Sequence in context: A254630 A145463 A144107 * A199149 A198669 A171059

Adjacent sequences:  A199644 A199645 A199646 * A199648 A199649 A199650

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Nov 08 2011

STATUS

approved

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Last modified September 30 03:54 EDT 2020. Contains 337434 sequences. (Running on oeis4.)