A209214 Number of nX3 1..7 arrays with every element value z a city block distance of exactly z from another element value z

1, 16, 488, 26029, 1958627, 201001373

Offset

1,2

Comments

Column 3 of A209215

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Sequence in context: A209392 A209022 A209057 * A183890 A250400 A214624

Adjacent sequences: A209211 A209212 A209213 * A209215 A209216 A209217

Keyword

nonn

Author

R. H. Hardin Mar 06 2012

Status

approved