1,1
Huaien Li and David C. Torney, Enumerations of Multigraphs, 2002.
Table of n, a(n) for n=1..10.
Sequence in context: A052924 A067324 A091702 * A198944 A112657 A007717
Adjacent sequences: A068590 A068591 A068592 * A068594 A068595 A068596
dead
approved