Number of non-isomorphic self-dual multiset partitions of weight n.

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =17a(6) =36a(7) =72a(8) =155a(9) =319a(10) =677a(11) =1429a(12) =3094a(13) =6648a(14) =14518a(15) =31796a(16) =70491a(17) =156818a(18) =352371a(19) =795952a(20) =1813580a(21) =4155367a(22) =9594425a(23) =22283566a(24) =52122379a(25) =122631874a(26) =290432439a(27) =691831161a(28) =1658270316a(29) =3997272089