Sum of positive divisors of A000032(n).

Terms

a(0) =3a(1) =1a(2) =4a(3) =7a(4) =8a(5) =12a(6) =39a(7) =30a(8) =48a(9) =140a(10) =168a(11) =200a(12) =576a(13) =522a(14) =1128a(15) =2688a(16) =2208a(17) =3572a(18) =12960a(19) =9350a(20) =17296a(21) =44520a(22) =54208a(23) =64680a(24) =158976a(25) =186048a(26) =361928a(27) =809200a(28) =826728a(29) =1169400