A209362 Number of nX3 1..3 arrays with every element value z a city block distance of exactly z from another element value z

1, 16, 409, 10796, 207438, 3706083, 63071815, 1032759720, 16901510507, 277570939815, 4565625401732, 75505210777685, 1255197541721876, 20903758632822412, 348175364757271477, 5794989272920621165

Offset

1,2

Comments

Column 3 of A209365

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A202733 A261833 A172205 * A338800 A318220 A035275

Adjacent sequences: A209359 A209360 A209361 * A209363 A209364 A209365

Keyword

nonn

Author

R. H. Hardin Mar 06 2012

Status

approved