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A209051 Number of nX1 0..6 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, 980, 2966, 8776, 26196, 77510, 234031, 708205, 2132677, 6421621, 19225005, 57566221, 172152197, 515505478, 1541863101, 4618183861, 13838387169, 41464367959, 124065165161, 371090483661, 1110570396650 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 1 of A209054

LINKS

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

EXAMPLE

All solutions for n=4

..0....1....0....1....3....0....0....3....2....0....1....2

..0....1....1....1....0....0....1....1....2....2....1....0

..1....0....1....1....0....0....1....1....2....0....1....2

..1....0....1....0....3....0....0....3....2....2....1....0

CROSSREFS

Sequence in context: A186739 A004114 A208957 * A209216 A076864 A209798

Adjacent sequences:  A209048 A209049 A209050 * A209052 A209053 A209054

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 04 2012

STATUS

approved

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Last modified November 25 21:44 EST 2014. Contains 250010 sequences.