Number of integer partitions of n whose number of submultisets is less than n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =2a(5) =3a(6) =5a(7) =7a(8) =9a(9) =14a(10) =20a(11) =21a(12) =27a(13) =43a(14) =50a(15) =56a(16) =69a(17) =98a(18) =118a(19) =143a(20) =165a(21) =200a(22) =229a(23) =249a(24) =282a(25) =454a(26) =507a(27) =555a(28) =637a(29) =706