A209393 Number of nX4 1..4 arrays with every element value z a city block distance of exactly z from another element value z

3, 152, 22416, 4488765, 816320455

Offset

1,1

Comments

Column 4 of A209394

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A100203 A287319 A189248 * A095225 A039934 A156990

Adjacent sequences: A209390 A209391 A209392 * A209394 A209395 A209396

Keyword

nonn

Author

R. H. Hardin Mar 07 2012

Status

approved