A variant of A006983, obtained if the trivial dissection is included in the count.
Table of n, a(n) for n=1..29.
Sequence in context: A037385 A115907 A063634 * A163735 A144472 A220249
Adjacent sequences: A178685 A178686 A178687 * A178689 A178690 A178691
N. J. A. Sloane, Dec 25 2010