Number of non-isomorphic multiset partitions of weight n with no singletons.

Terms

a(0) =1a(1) =0a(2) =2a(3) =3a(4) =12a(5) =23a(6) =84a(7) =204a(8) =682a(9) =1977a(10) =6546a(11) =21003a(12) =72038a(13) =248055a(14) =888771a(15) =3240578a(16) =12152775a(17) =46527471a(18) =182339441a(19) =729405164a(20) =2979121279a(21) =12407308136a(22) =52670355242a(23) =227725915268