A209216 Number of nX1 0..7 arrays with every element value z a city block distance of exactly z from another element value z

1, 2, 5, 12, 33, 99, 319, 1079, 3555, 11300, 35863, 111731, 352219, 1103216, 3517983, 11225970, 35689268, 113349420, 359442201, 1137949882, 3593078597, 11345200954, 35855116040, 113443380209, 358576231579, 1134002435072, 3586987559568

Offset

1,2

Comments

Column 1 of A209218

Links

R. H. Hardin, Table of n, a(n) for n = 1..68

Example

Some solutions for n=8
..2....0....3....4....0....1....5....2....5....3....1....0....3....0....0....7
..3....4....3....0....3....1....3....2....5....1....1....0....0....4....2....0
..2....2....0....1....1....0....0....2....1....1....1....0....2....2....2....0
..0....0....3....1....1....0....3....2....1....3....0....4....3....3....2....0
..3....2....3....4....3....3....3....0....1....1....1....0....2....2....2....0
..1....4....2....1....0....1....5....2....5....1....1....0....0....4....1....1
..1....2....0....1....1....1....3....0....5....0....1....0....1....3....1....1
..3....0....2....0....1....3....0....2....0....0....0....4....1....0....1....7

Crossrefs

Sequence in context: A004114 A208957 A209051 * A076864 A209798 A196545

Adjacent sequences: A209213 A209214 A209215 * A209217 A209218 A209219

Keyword

nonn

Author

R. H. Hardin Mar 06 2012

Status

approved