Number of non-isomorphic set multipartitions (multisets of sets) of weight n with no singletons.

A321677

Number of non-isomorphic set multipartitions (multisets of sets) of weight n with no singletons.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =1a(4) =4a(5) =4a(6) =16a(7) =22a(8) =70a(9) =132a(10) =375a(11) =848a(12) =2428a(13) =6256a(14) =18333a(15) =52560a(16) =161436a(17) =500887a(18) =1624969a(19) =5384625a(20) =18438815a(21) =64674095a(22) =233062429a(23) =859831186a(24) =3248411250a(25) =12545820860a(26) =49508089411a(27) =199410275018a(28) =819269777688

External references