Number of different aperiodic multisets that fit within some normal multiset of size n.

Terms

a(0) =1a(1) =3a(2) =9a(3) =26a(4) =75a(5) =207a(6) =565a(7) =1518a(8) =4044a(9) =10703a(10) =28234a(11) =74277a(12) =195103a(13) =511902a(14) =1342147a(15) =3517239a(16) =9214412a(17) =24134528a(18) =63204417a(19) =165505811a(20) =433361425a(21) =1134664831a(22) =2970787794a(23) =7777975396a(24) =20363634815a(25) =53313819160a(26) =139579420528a(27) =365427311171a(28) =956707667616