%I
%S 1,1,2,3,7,13,39,88,265
%N Number of unlabeled multiset clutters of weight n.
%C A multiset clutter is a connected antichain of finite multisets. The weight of a multiset clutter is the sum of cardinalities (counting multiplicity) of its edges.
%e Nonisomorphic representatives of the a(5) = 13 multiset clutters are:
%e ((11111)), ((11112)), ((11122)), ((11123)), ((11223)), ((11234)), ((12345)), ((11)(122)), ((11)(123)), ((12)(111)), ((12)(113)), ((12)(134)), ((13)(122)).
%Y Cf. A007716, A048143, A286520, A293607, A293993.
%K nonn,more
%O 0,3
%A _Gus Wiseman_, Oct 21 2017
