|
|
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
|
|
|
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
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|