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

Terms

a(0) =3a(1) =35a(2) =1045a(3) =24871a(4) =29029a(5) =50065a(6) =58435a(7) =64285a(8) =87685a(9) =137885a(10) =140335a(11) =1390753a(12) =1529983a(13) =1739507a(14) =2011009a(15) =2086903a(16) =3189625a(17) =3281663a(18) =3501605a(19) =3722875a(20) =3830827a(21) =3852155a(22) =6605945a(23) =7711405a(24) =8409305a(25) =9815195a(26) =11413205a(27) =11569805a(28) =13321295a(29) =13932919