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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.

A380621 Number of unsensed combinatorial maps with n edges and 3 vertices.

Original entry on oeis.org

1, 5, 30, 208, 1894, 21440, 296952, 4799336
Offset: 2

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Author

Andrew Howroyd, Jan 28 2025

Keywords

Comments

By duality, also the number of unsensed combinatorial maps with n edges and 3 faces.

Crossrefs

Column 3 of A380616.
Cf. A380619 (sensed), A380620 (2 vertices).

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

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