Numbers with 5 odd divisors.

Terms

a(0) =81a(1) =162a(2) =324a(3) =625a(4) =648a(5) =1250a(6) =1296a(7) =2401a(8) =2500a(9) =2592a(10) =4802a(11) =5000a(12) =5184a(13) =9604a(14) =10000a(15) =10368a(16) =14641a(17) =19208a(18) =20000a(19) =20736a(20) =28561a(21) =29282a(22) =38416a(23) =40000a(24) =41472a(25) =57122a(26) =58564a(27) =76832a(28) =80000a(29) =82944