Semiprimes which are sub-perfect powers.

Terms

a(0) =15a(1) =26a(2) =35a(3) =143a(4) =215a(5) =323a(6) =511a(7) =899a(8) =1727a(9) =1763a(10) =2047a(11) =2186a(12) =2743a(13) =3599a(14) =5183a(15) =7999a(16) =10403a(17) =11663a(18) =13823a(19) =19043a(20) =22499a(21) =32399a(22) =36863a(23) =39203a(24) =51983a(25) =54871a(26) =57599a(27) =72899a(28) =79523a(29) =97343