A209718 Number of n X 2 0..4 arrays with every element value z a city block distance of exactly z from another element value z.

2, 13, 115, 1468, 19993, 242036, 2830612, 33559479, 405001256, 4768478349, 55177233176, 632269120829, 7270703713269, 83723657505339, 959510778223080, 10972846708863116, 125671067783934260, 1441312273531923562

Offset

1,1

Comments

Column 2 of A209720.

Links

R. H. Hardin, Table of n, a(n) for n = 1..64

Example

Some solutions for n=5
..3..3....0..1....3..3....1..2....2..4....0..0....0..4....2..0....4..1....3..0
..1..3....3..1....3..3....1..2....0..2....3..2....0..3....2..3....0..1....4..4
..1..3....0..2....1..3....2..2....3..3....2..2....3..1....2..2....1..1....0..3
..1..3....2..3....1..3....0..2....4..2....1..3....4..1....3..1....1..1....3..0
..3..3....0..2....0..3....1..1....3..3....1..2....0..3....2..1....4..0....4..4

Crossrefs

Cf. A209720.

Sequence in context: A212071 A258620 A209174 * A208958 A209052 A209217

Adjacent sequences: A209715 A209716 A209717 * A209719 A209720 A209721

Keyword

nonn

Author

R. H. Hardin, Mar 12 2012

Status

approved