Odd numbers k such that A064989(sigma(k)) >= k.

Terms

a(0) =1a(1) =9a(2) =25a(3) =225a(4) =289a(5) =729a(6) =1681a(7) =2401a(8) =2601a(9) =3481a(10) =5041a(11) =6561a(12) =7225a(13) =7921a(14) =10201a(15) =15129a(16) =15625a(17) =17161a(18) =18225a(19) =19881a(20) =21609a(21) =27889a(22) =28561a(23) =29929a(24) =31329a(25) =35721a(26) =42025a(27) =45369a(28) =59049a(29) =60025