1,2
Table of n, a(n) for n=1..9.
Jessica Shi, Enumeration of unlabeled graph classes: A study of tree decompositions and related approaches, 2015.
Sequence in context: A111283 A150297 A150298 * A278301 A242586 A196018
Adjacent sequences: A280765 A280766 A280767 * A280769 A280770 A280771
nonn,more
N. J. A. Sloane, Jan 17 2017
approved