A209215 T(n,k)=Number of nXk 1..7 arrays with every element value z a city block distance of exactly z from another element value z

0, 1, 1, 1, 2, 1, 3, 16, 16, 3, 3, 152, 488, 152, 3, 16, 1721, 26029, 26029, 1721, 16, 24, 24255, 1958627, 8460962, 1958627, 24255, 24, 114, 399281, 201001373

Offset

1,5

Comments

Table starts

..0.....1.......1.......3.......3........16.....24.114

..1.....2......16.....152....1721.....24255.399281

..1....16.....488...26029.1958627.201001373

..3...152...26029.8460962

..3..1721.1958627

.16.24255

.24

Links

Table of n, a(n) for n=1..31.

Example

Some solutions for n=6 k=2
..2..4....5..6....4..4....4..2....2..3....2..2....1..1....6..4....2..5....1..1
..4..5....5..1....2..4....2..3....3..2....2..2....4..1....3..2....4..3....4..2
..2..3....1..1....1..1....3..3....2..2....2..4....3..3....2..2....2..4....4..3
..1..1....1..2....2..1....3..4....2..3....1..1....3..3....2..3....1..1....2..2
..1..4....2..5....4..4....3..3....1..1....2..1....3..4....2..4....2..3....3..4
..5..3....6..5....1..1....1..1....2..1....4..1....3..3....2..6....4..5....2..4

Crossrefs

Sequence in context: A209394 A209023 A209058 * A000618 A379941 A132950

Adjacent sequences: A209212 A209213 A209214 * A209216 A209217 A209218

Keyword

nonn,tabl

Author

R. H. Hardin Mar 06 2012

Status

approved