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

1,2

Links

Table of n, a(n) for n=1..5.

Crossrefs

Row sums of A385385.

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

Sequence in context: A072879 A112958 A080991 * A000844 A000863 A291947

Adjacent sequences: A385381 A385382 A385383 * A385385 A385386 A385387

Keyword

nonn,more

Author

Pontus von Brömssen, Jun 27 2025

Status

approved