|
|
A219739
|
|
Unmatched value maps: number of nX6 binary arrays indicating the locations of corresponding elements not equal to any horizontal, vertical or antidiagonal neighbor in a random 0..1 nX6 array
|
|
2
|
|
|
21, 129, 1180, 9425, 78661, 647252, 5350080, 44159095, 364647622, 3010723330, 24858935864, 205253857220, 1694729679245, 13992960979394, 115536377026413, 953955009802438, 7876568121973188, 65034854910941849, 536976546612691621
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
Zeilberger's Maple code (see links in A228285) would give a recurrence for this sequence. - N. J. A. Sloane, Aug 22 2013
|
|
EXAMPLE
|
Some solutions for n=3
..1..0..1..0..1..0....0..0..1..0..0..0....0..0..0..0..0..0....0..0..1..0..0..1
..0..0..0..0..0..0....1..0..0..1..0..1....0..1..0..0..0..1....0..0..0..0..0..0
..1..0..0..1..0..0....0..0..0..0..0..0....0..0..0..1..0..0....0..1..0..1..0..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|