A209363 Number of nX4 1..3 arrays with every element value z a city block distance of exactly z from another element value z

3, 122, 10796, 804545, 42033202, 2043431891, 95757163046, 4450804913246, 208608618878322, 9821357826542694, 464584671831559050, 22043049977515754013, 1047048789075528283907, 49710984903586449661602

Offset

1,1

Comments

Column 4 of A209365

Links

R. H. Hardin, Table of n, a(n) for n = 1..28

Example

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

Crossrefs

Sequence in context: A156001 A229633 A171357 * A012569 A078258 A258658

Adjacent sequences: A209360 A209361 A209362 * A209364 A209365 A209366

Keyword

nonn

Author

R. H. Hardin Mar 06 2012

Status

approved