A008325 - OEIS

A008325

Number of simple regular trivalent bipartite graphs with 2n nodes.

1, 1, 2, 6, 14, 41, 157, 725, 4196, 29816, 246644, 2297075, 23503477, 260265023, 3090336300, 39101547971, 524782945991, 7443247863498, 111221983956652, 1746165682538497, 28734206614035245, 494526496354065244, 8883865784392246280, 166286434745252091055, 3237719048384605059117, 65477287940472122129194

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OFFSET

3,3

COMMENTS

Euler transform of A006823. - Peter J. Taylor, Sep 28 2017

LINKS

Table of n, a(n) for n=3..28.

Gunnar Brinkmann, Fast generation of cubic graphs, J. Graph Theory 23(2) (1996) 139-149.

Sean A. Irvine, On the difference between A004066 and A008325.

Shobhna Singh, Constrained models in aperiodic systems, Ph. D. Thesis, Cardiff Univ. (Wales 2025). See p. 51.

MATHEMATICA

A006823 = Cases[Import["https://oeis.org/A006823/b006823.txt", "Table"], {_, _}][[All, 2]];