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A052448 Number of simple unlabeled n-node graphs of edge-connectivity 3. 6
0, 0, 0, 1, 2, 15, 121, 2159, 68715, 3952378, 389968005, 65161587084 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..12.

Travis Hoppe and Anna Petrone, Encyclopedia of Finite Graphs

T. Hoppe and A. Petrone, Integer sequence discovery from small graphs, arXiv preprint arXiv:1408.3644 [math.CO], 2014.

Jens M. Schmidt, Combinatorial data.

Eric Weisstein's World of Mathematics, k-Edge Connected Graph.

CROSSREFS

Column k=3 of A263296.

Cf. other edge-connectivity unlabeled graph sequences A052446, A052447, A241703, A241704, A241705.

Cf. A338511, A338583, A338593, A338594, A338604, A339072.

Sequence in context: A161937 A074621 A185758 * A168502 A127610 A085228

Adjacent sequences:  A052445 A052446 A052447 * A052449 A052450 A052451

KEYWORD

nonn,hard,more

AUTHOR

Eric W. Weisstein, May 08 2000

EXTENSIONS

a(8), a(9), a(10) from the Encyclopedia of Finite Graphs by Travis Hoppe and Anna Petrone, Apr 22 2014

a(11) by Jens M. Schmidt, Feb 18 2019

a(12) from Jens M. Schmidt's web page, Jan 10 2021

STATUS

approved

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Last modified February 24 18:41 EST 2021. Contains 341577 sequences. (Running on oeis4.)