a(n) = smallest number x such that sigma(x) = 2x + 2n.

Terms

a(0) =6a(1) =20a(2) =12a(3) =8925a(4) =56a(5) =40a(6) =24a(7) =272a(8) =550a(9) =208a(10) =176a(11) =1312a(12) =112a(13) =80a(14) =48a(15) =945a(16) =572a(17) =928a(18) =2205a(19) =5696a(20) =736a(21) =9555a(22) =350a(23) =490a(24) =60a(25) =416a(26) =352a(27) =90a(28) =84a(29) =160