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A222779
T(n,k)=Number of nXk 0..6 arrays with no element equal to another at a city block distance of exactly two, and new values 0..6 introduced in row major order
4
1, 2, 2, 3, 7, 3, 7, 34, 34, 7, 20, 388, 969, 388, 20, 67, 6814, 64752, 64752, 6814, 67, 255, 148168, 5227536, 17510800, 5227536, 148168, 255, 1079, 3518434, 436214328, 4929510472, 4929510472, 436214328, 3518434, 1079, 4987, 86343148, 36601614264
OFFSET
1,2
COMMENTS
Table starts
....1........2...........3.............7............20............67
....2........7..........34...........388..........6814........148168
....3.......34.........969.........64752.......5227536.....436214328
....7......388.......64752......17510800....4929510472.1392230785552
...20.....6814.....5227536....4929510472.4681590376584
...67...148168...436214328.1392230785552
..255..3518434.36601614264
.1079.86343148
.4987
LINKS
EXAMPLE
Some solutions for n=3 k=4
..0..0..1..2....0..0..1..2....0..1..2..3....0..0..1..2....0..1..2..3
..2..2..3..4....2..3..1..4....4..1..5..3....2..3..4..2....4..5..5..4
..1..5..3..1....5..5..2..6....5..2..4..0....1..5..4..3....3..3..0..6
CROSSREFS
Sequence in context: A222838 A222944 A222871 * A222894 A210753 A208762
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Mar 05 2013
STATUS
approved