

A052445


Number of simple exactly4connected unlabeled nnode graphs.


6




OFFSET

1,6


COMMENTS

This counts graphs whose connectivity is exactly 4. However, the numbers are not correct: the smallest 4connected graph is the complete graph K_5, so the initial terms are incorrect. See A086216 and A259862 for more information.  N. J. A. Sloane, Jul 08 2015


LINKS

Table of n, a(n) for n=1..7.
Eric Weisstein's World of Mathematics, kconnected Graph.


CROSSREFS

Cf. A052441, ..., A052445.
See A086216 for another version. See also A259862.
Sequence in context: A203314 A174652 A024011 * A229197 A188721 A212996
Adjacent sequences: A052442 A052443 A052444 * A052446 A052447 A052448


KEYWORD

nonn,more


AUTHOR

Eric W. Weisstein


EXTENSIONS

Partially edited by N. J. A. Sloane, Jul 08 2015 at the suggestion of Brendan McKay


STATUS

approved



