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A199133 T(n,k)=Number of nXk 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor 9
1, 1, 1, 1, 2, 1, 3, 2, 2, 3, 6, 12, 6, 12, 6, 5, 30, 19, 19, 30, 5, 19, 30, 70, 258, 70, 30, 19, 37, 210, 264, 1409, 1409, 264, 210, 37, 29, 560, 1038, 2836, 11475, 2836, 1038, 560, 29, 124, 560, 4155, 48320, 33970, 33970, 48320, 4155, 560, 124, 240, 4200, 16896, 295092 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,5
COMMENTS
Table starts
...1....1.....1........3.........6...........5............19..............37
...1....2.....2.......12........30..........30...........210.............560
...1....2.....6.......19........70.........264..........1038............4155
...3...12....19......258......1409........2836.........48320..........295092
...6...30....70.....1409.....11475.......33970........887966.........8181546
...5...30...264.....2836.....33970......438502.......5926852........82908094
..19..210..1038....48320....887966.....5926852.....358599045......7633754680
..37..560..4155...295092...8181546....82908094....7633754680....247746055048
..29..560.16896...629776..26354800..1187201812...56435001338...2782790788798
.124.4200.69584.11499816.739462036.17307138986.3718131446504.280882561003836
LINKS
EXAMPLE
Some solutions for n=7 k=5
..0..1..0..1..0....0..1..0..1..0....0..1..0..1..0....0..1..0..1..0
..2..0..1..0..1....1..2..1..2..1....1..0..1..0..2....2..0..2..0..2
..0..1..0..1..2....0..1..2..0..2....2..1..0..2..1....0..1..0..2..0
..1..2..1..2..1....1..0..1..2..0....1..2..1..0..2....1..2..1..0..1
..2..0..2..0..2....0..1..0..1..2....2..1..0..2..0....2..1..2..1..2
..1..2..0..2..1....1..2..1..2..0....1..0..2..1..2....1..2..1..2..1
..0..1..2..0..2....2..0..2..0..2....0..2..0..2..1....0..1..2..0..2
CROSSREFS
Sequence in context: A029270 A364503 A090350 * A199246 A367858 A363718
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Nov 03 2011
STATUS
approved

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Last modified March 28 22:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)