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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
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified February 22 20:30 EST 2019. Contains 320404 sequences. (Running on oeis4.)