A052444 - OEIS

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A052444

Number of simple unlabeled n-node graphs of connectivity 3.

4

0, 0, 0, 1, 2, 13, 111, 2004, 66410, 3902344, 388624106, 65142804740

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,5

LINKS

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

Jens M. Schmidt, Data files in graph6 format

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

FORMULA

a(n) = A006290(n) - A086216(n). - Andrew Howroyd, Sep 04 2019

CROSSREFS

Column k=3 of A259862.

Cf. A000719, A006290, A052442, A052443, A052445, A086216.

Sequence in context: A192204 A176932 A258916 * A277463 A277469 A046888

Adjacent sequences: A052441 A052442 A052443 * A052445 A052446 A052447

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein

EXTENSIONS

Name edited and a(8)-a(11) by Jens M. Schmidt, Feb 18 2019

a(3)-a(4) corrected by Andrew Howroyd, Aug 28 2019

a(12) from Sean A. Irvine, Nov 28 2021

STATUS

approved