login
A345324
Number of unlabeled 2-connected simple graphs with girth at least 6.
0
1, 1, 2, 3, 8, 17, 55, 166, 675, 2977, 15553, 90159, 586769, 4197170, 32919812, 281235872, 2609796620
OFFSET
6,3
COMMENTS
The girth is the length of the shortest cycle, so girth at least 6 means there are no cycles of length 3, 4 or 5.
CROSSREFS
A345246 for girth at least 4.
A140440 for girth at least 5.
Sequence in context: A148035 A148036 A148037 * A290383 A099960 A324963
KEYWORD
nonn,more
AUTHOR
Brendan McKay, Jun 14 2021
STATUS
approved