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A209056
Number of nX2 1..6 arrays with every element value z a city block distance of exactly z from another element value z
0
1, 2, 16, 152, 1721, 24255, 353922, 4498393, 53903971
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 2 of A209058
LINKS
Table of n, a(n) for n=1..9.
EXAMPLE
Some solutions for n=6
..3..5....5..3....5..2....2..3....1..3....6..3....3..2....2..3....4..1....4..4
..4..4....5..2....2..2....2..2....1..3....1..1....4..3....5..2....4..1....3..1
..1..1....2..2....3..2....3..2....1..3....3..3....2..2....3..3....1..1....4..1
..3..1....2..3....2..2....1..1....3..3....1..1....3..1....2..2....1..4....2..3
..5..4....1..5....2..5....2..2....1..3....3..1....2..1....3..3....1..4....4..4
..4..4....1..5....3..2....3..2....1..3....3..6....4..1....2..5....1..1....2..4
CROSSREFS
Sequence in context: A209391 A259901 A209021 * A209213 A012391 A012387
Adjacent sequences: A209053 A209054 A209055 * A209057 A209058 A209059
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 04 2012
STATUS
approved

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Last modified October 26 00:42 EDT 2024. Contains 377104 sequences.
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