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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
OFFSET
1,2
COMMENTS
Column 1 of A209054
LINKS
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: A266292 A004114 A208957 * A209216 A076864 A209798
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 04 2012
STATUS
approved