sigma(n) plus the n-th prime gives a cube.

Terms

a(0) =178a(1) =185a(2) =268a(3) =548a(4) =581a(5) =2142a(6) =9474a(7) =17027a(8) =17108a(9) =66367a(10) =71212a(11) =155131a(12) =230521a(13) =296001a(14) =318558a(15) =335880a(16) =555896a(17) =620041a(18) =1141190a(19) =1158839a(20) =1559606a(21) =1650646a(22) =2021877a(23) =3274046a(24) =3655189a(25) =3668878a(26) =4023383