Odd numbers with prime sum of divisors.

Terms

a(0) =9a(1) =25a(2) =289a(3) =729a(4) =1681a(5) =2401a(6) =3481a(7) =5041a(8) =7921a(9) =10201a(10) =15625a(11) =17161a(12) =27889a(13) =28561a(14) =29929a(15) =83521a(16) =85849a(17) =146689a(18) =279841a(19) =458329a(20) =491401a(21) =531441a(22) =552049a(23) =579121a(24) =597529a(25) =683929a(26) =703921a(27) =707281a(28) =734449a(29) =829921