|
| |
|
|
A142886
|
|
Number of polyominoes with n cells that have the symmetry group D_8.
|
|
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; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,10
|
|
|
COMMENTS
| 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 * A099026 A205341 A195664
Adjacent sequences: A142883 A142884 A142885 * A142887 A142888 A142889
|
|
|
KEYWORD
| nonn,more
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Jan 01 2009
|
| |
|
|
