Sum of divisors of the minimal numbers (A007416).

Terms

a(0) =1a(1) =3a(2) =7a(3) =12a(4) =28a(5) =31a(6) =60a(7) =91a(8) =124a(9) =168a(10) =127a(11) =360a(12) =403a(13) =546a(14) =508a(15) =744a(16) =1170a(17) =1651a(18) =2418a(19) =2880a(20) =2821a(21) =3048a(22) =2047a(23) =4368a(24) =3751a(25) =5952a(26) =9360a(27) =9906a(28) =8188a(29) =12493