A385384 Number of polyominoes, i.e., connected nonempty subsets of square cells (or vertices), of the n X n flat torus, up to cyclic shifts and reflections of rows and columns, as well as interchange of rows and columns.

1, 4, 19, 437, 65325

Offset: 1

Author

Pontus von Brömssen, Jun 27 2025

Keywords

• nonn
• more

Crossrefs

Row sums of A385385.

Cf. A385382 (interchange of rows and columns of the torus not allowed), A385389 (edge subsets).