Number of acyclic *digraphs* with *n* unlabeled nodes http://oeis.org/A003087 On Sun, Nov 24, 2013 at 11:02 PM, David Wilson <davidwwilson at comcast.net>wrote: > Is there a sequence that counts unlabeled DAGs or rooted DAGs? > > > _______________________________________________ > > Seqfan Mailing list - http://list.seqfan.eu/ >