Numbers n such that psi(n) = 2*phi(n).

Terms

a(0) =3a(1) =9a(2) =27a(3) =35a(4) =81a(5) =175a(6) =243a(7) =245a(8) =729a(9) =875a(10) =1045a(11) =1225a(12) =1715a(13) =2187a(14) =4375a(15) =5225a(16) =6125a(17) =6561a(18) =8575a(19) =11495a(20) =12005a(21) =19683a(22) =19855a(23) =21875a(24) =24871a(25) =26125a(26) =29029a(27) =30625a(28) =42875a(29) =50065