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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.

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A345247 Number of unlabeled graphs of odd girth at least 7 with n vertices.

Original entry on oeis.org

1, 2, 3, 7, 13, 35, 89, 306, 1141, 5615, 33397, 260624, 2623475, 35100394, 627244166, 15122214205, 493568138475
Offset: 1

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Author

Brendan McKay, Jun 12 2021

Keywords

Comments

The odd girth of a graph is the length of a shortest cycle of odd length. Thus, these are the graphs (not necessarily connected) that do not have a triangle or C_5 as a subgraph. The bipartite graphs (which have no odd cycles) are included.

Crossrefs

EULER transform of A165452.
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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