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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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.

Table of values

n a(n)
1 1
2 4
3 19
4 437
5 65325

List of values

[1, 4, 19, 437, 65325]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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