login
A357648
Number of polyominoes with n cells that have the symmetry group D_8 and are without holes.
2
1, 0, 0, 1, 1, 0, 0, 0, 2, 0, 0, 1, 2, 0, 0, 1, 3, 0, 0, 1, 5, 0, 0, 2, 8, 0, 0, 2, 13, 0, 0, 3, 20, 0, 0, 5, 33, 0, 0, 6, 55, 0, 0, 10, 93, 0, 0, 13, 157, 0, 0, 22, 268, 0, 0, 30, 461, 0, 0, 51, 801, 0, 0, 71, 1396, 0, 0, 124, 2459, 0, 0, 175, 4329, 0, 0, 317, 7696
OFFSET
1,9
CROSSREFS
Sequence in context: A287240 A025875 A026840 * A025873 A208589 A112171
KEYWORD
nonn
AUTHOR
John Mason, Oct 10 2022
STATUS
approved