Partial sums of products of proper divisors of n (A007956).

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =6a(5) =12a(6) =13a(7) =21a(8) =24a(9) =34a(10) =35a(11) =179a(12) =180a(13) =194a(14) =209a(15) =273a(16) =274a(17) =598a(18) =599a(19) =999a(20) =1020a(21) =1042a(22) =1043a(23) =14867a(24) =14872a(25) =14898a(26) =14925a(27) =15709a(28) =15710a(29) =42710