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A199356 T(n,k)=Number of nXk 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or one horizontal or vertical neighbors 7
1, 1, 1, 1, 1, 1, 1, 45, 45, 1, 10, 105, 930, 105, 10, 45, 4251, 7945, 7945, 4251, 45, 105, 9175, 808721, 705263, 808721, 9175, 105, 105, 447916, 36379420, 66367192, 66367192, 36379420, 447916, 105, 1155, 958259, 821116806, 6518500460 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,8
COMMENTS
Table starts
....1........1..........1............1.............10.............45
....1........1.........45..........105...........4251...........9175
....1.......45........930.........7945.........808721.......36379420
....1......105.......7945.......705263.......66367192.....6518500460
...10.....4251.....808721.....66367192....71245512532.32990481786550
...45.....9175...36379420...6518500460.32990481786550
..105...447916..821116806.661357976129
..105...958259.7583425311
.1155.50233308
.5505
LINKS
EXAMPLE
Some solutions for n=3 k=3
..0..1..1....0..1..2....0..1..2....0..1..1....0..0..1....0..0..1....0..1..2
..2..2..0....3..1..0....1..2..3....2..0..3....2..3..2....2..2..3....2..1..3
..0..3..3....2..3..1....0..1..3....3..1..2....3..1..0....3..3..1....2..0..3
CROSSREFS
Sequence in context: A087083 A216407 A137439 * A199523 A119415 A165866
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Nov 05 2011
STATUS
approved

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Last modified March 29 06:57 EDT 2024. Contains 371265 sequences. (Running on oeis4.)