|
Search: id:A142886
|
|
|
| A142886 |
|
Number of polyominoes with n cells that have the symmetry group D_8. |
|
+0
10
|
|
| 1, 1, 0, 0, 1, 1, 0, 0, 1, 2, 0, 0, 3, 2, 0, 0, 5, 4, 0, 0, 12, 7, 0, 0, 20, 11, 0, 0
(list; graph; listen)
|
|
|
OFFSET
|
0,10
|
|
|
COMMENT
|
This is the largest possible symmetry group that a polyomino can have.
|
|
REFERENCES
|
D. H. Redelmeier, Counting polyominoes: yet another attack, Discrete Math., 36 (1981), 191-203.
|
|
LINKS
|
Tomas Oliveira e Silva, Enumeration of polyominoes
D. H. Redelmeier, Table 3 of Counting polyominoes...
|
|
CROSSREFS
|
Sequences classifying polyominoes by symmetry group: A000105, A006746, A006747, A006748, A006749, A056877, A056878, A142886, A144553, A144554.
Sequence in context: A113411 A125095 A143161 this_sequence A099026 A053202 A050186
Adjacent sequences: A142883 A142884 A142885 this_sequence A142887 A142888 A142889
|
|
KEYWORD
|
nonn,more
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com), Jan 01 2009
|
|
|
Search completed in 0.002 seconds
|
