A385384 - cp's OEIS frontend

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.

%I A385384 #5 Jun 29 2025 11:07:37
%S A385384 1,4,19,437,65325
%N 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.
%Y A385384 Row sums of A385385.
%Y A385384 Cf. A385382 (interchange of rows and columns of the torus not allowed), A385389 (edge subsets).
%K A385384 nonn,more
%O A385384 1,2
%A A385384 _Pontus von Brömssen_, Jun 27 2025

cp's OEIS Frontend

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.