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A199149 T(n,k)=Number of nXk 0..3 arrays with values 0..3 introduced in row major order and each element equal to one or two horizontal and vertical neighbors 9
0, 1, 1, 1, 3, 1, 2, 13, 13, 2, 3, 65, 132, 65, 3, 6, 393, 2453, 2453, 393, 6, 11, 2539, 42420, 125468, 42420, 2539, 11, 23, 16866, 794416, 6235011, 6235011, 794416, 16866, 23, 47, 113432, 14511531, 316561994, 839006010, 316561994, 14511531, 113432, 47, 102 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

Table starts

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

...1.......3..........13.............65..............393..............2539

...1......13.........132...........2453............42420............794416

...2......65........2453.........125468..........6235011.........316561994

...3.....393.......42420........6235011........839006010......117380324984

...6....2539......794416......316561994.....117380324984....44832664800117

..11...16866....14511531....15958823113...16158623337745.16925667317073175

..23..113432...268456338...806680624447.2239304268913257

..47..766473..4940928443.40736752748774

.102.5188597.91146218920

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..83

EXAMPLE

Some solutions for n=3 k=3

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

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

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

CROSSREFS

Sequence in context: A145463 A144107 A199647 * A198669 A171059 A198708

Adjacent sequences:  A199146 A199147 A199148 * A199150 A199151 A199152

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Nov 03 2011

STATUS

approved

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Last modified September 20 03:51 EDT 2020. Contains 337264 sequences. (Running on oeis4.)