A013924 Number of labeled connected graphs with n nodes and 2 cutpoints.
12, 180, 4560, 211680, 17186624, 2416430016, 597615868800, 266262716016000, 218583901063537152, 336744209796848156160, 987653716558634390487040, 5576385411303897176201779200, 61117320790343064985205192540160
Offset: 4
Keywords
Links
- Andrew Howroyd, Table of n, a(n) for n = 4..50
- S. Selkow, The enumeration of labeled graphs by number of cutpoints, Discr. Math. 185 (1998), 183-191.
Crossrefs
Column k=2 of A370064.
Extensions
More terms from Sean A. Irvine, Aug 29 2018