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A322141 Number of unlabeled 2-connected multigraphs with n edges. 1
1, 1, 1, 2, 3, 6, 14, 30 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

We consider a single edge to be 2-connected, so a(1) = 1.

LINKS

Table of n, a(n) for n=0..7.

Gus Wiseman, Non-isomorphic representatives of the a(1) = 1 through a(6) = 14 unlabeled 2-connected multigraphs.

CROSSREFS

Cf. A002218, A002905, A013922, A275307, A304118, A304887, A322110, A322117, A322118, A322138, A322140.

Sequence in context: A187033 A087293 A250022 * A240749 A331684 A106364

Adjacent sequences:  A322138 A322139 A322140 * A322142 A322143 A322144

KEYWORD

nonn,more

AUTHOR

Gus Wiseman, Nov 27 2018

STATUS

approved

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Last modified August 8 06:27 EDT 2020. Contains 336290 sequences. (Running on oeis4.)