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A013925
Number of labeled connected graphs with n nodes and 3 cutpoints.
2
60, 1920, 75600, 4663680, 469336896, 79132032000, 23121510192000, 12082931084928000, 11564306171310537216, 20625639730671895535616, 69501783433272242637312000, 447403458171641201324598067200, 5550030610876067133522251137105920
OFFSET
5,1
COMMENTS
Selkow paper has typographical error a(9) = 469336898. - Sean A. Irvine, Aug 29 2018
LINKS
S. Selkow, The enumeration of labeled graphs by number of cutpoints, Discr. Math. 185 (1998), 183-191.
CROSSREFS
Column k=3 of A370064.
Sequence in context: A214946 A058836 A166792 * A083367 A173123 A004353
KEYWORD
nonn
AUTHOR
Stanley Selkow (sms(AT)owl.WPI.EDU)
EXTENSIONS
a(9) corrected and more terms from Sean A. Irvine, Aug 29 2018
STATUS
approved