sigma(n) + n is a cube.

Terms

a(0) =13a(1) =76a(2) =280a(3) =4258a(4) =4719a(5) =4887a(6) =12207a(7) =13106a(8) =41823a(9) =42804a(10) =51671a(11) =54261a(12) =56283a(13) =65512a(14) =77671a(15) =95139a(16) =98219a(17) =135724a(18) =147440a(19) =149176a(20) =177911a(21) =220546a(22) =239599a(23) =279145a(24) =285347a(25) =285957a(26) =299432a(27) =308503a(28) =312137a(29) =335106