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

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

R. H. Hardin, Table of n, a(n) for n = 1..49

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

Adjacent sequences: A222776 A222777 A222778 * A222780 A222781 A222782

Keyword

nonn,tabl

Author

R. H. Hardin Mar 05 2013

Status

approved