A209472 Number of n X 4 0..2 arrays with every element value z a city block distance of exactly z from another element value z.

10, 635, 46470, 2497939, 128482557, 6446131005, 325528559843, 16644234605381, 852914715264837, 43670664954372485, 2233712112728209837, 114208859183577359217, 5839967102661447809375, 298652899566008996574607

Offset

1,1

Comments

Column 4 of A209476.

Links

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

Example

Some solutions for n=3
..0..0..0..0....0..0..2..2....2..2..2..2....2..0..0..0....2..1..1..1
..1..0..2..0....0..2..2..0....1..1..2..0....2..2..1..2....0..2..1..1
..1..1..0..2....1..1..1..2....1..0..0..0....0..2..1..1....2..0..0..1

Crossrefs

Cf. A209476.

Sequence in context: A159622 A115692 A179889 * A132543 A261328 A280897

Adjacent sequences: A209469 A209470 A209471 * A209473 A209474 A209475

Keyword

nonn

Author

R. H. Hardin, Mar 09 2012

Status

approved