1,2
Table of n, a(n) for n=1..8.
Jessica Shi, Enumeration of unlabeled graph classes: A study of tree decompositions and related approaches, 2015.
Sequence in context: A243324 A018952 A019028 * A127114 A138909 A138983
Adjacent sequences: A280766 A280767 A280768 * A280770 A280771 A280772
nonn,more
N. J. A. Sloane, Jan 17 2017
approved