A357648 Number of polyominoes with n cells that have the symmetry group D_8 and are without holes.

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

Links

Table of n, a(n) for n=1..77.

Crossrefs

Cf. A000104, A142886.

Sequence in context: A287240 A025875 A026840 * A025873 A208589 A112171

Adjacent sequences: A357645 A357646 A357647 * A357649 A357650 A357651

Keyword

nonn

Author

John Mason, Oct 10 2022

Status

approved