Number of partitions p of n such that min(p) < (number of parts of p) < max(p).

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =2a(6) =3a(7) =6a(8) =9a(9) =13a(10) =18a(11) =26a(12) =35a(13) =50a(14) =66a(15) =90a(16) =117a(17) =155a(18) =199a(19) =260a(20) =331a(21) =425a(22) =537a(23) =681a(24) =852a(25) =1070a(26) =1328a(27) =1652a(28) =2038a(29) =2517