Numbers n such that phi(n) = 4*phi(n-1).

Terms

a(0) =1261a(1) =13651a(2) =17557a(3) =18721a(4) =24511a(5) =42121a(6) =113611a(7) =244531a(8) =266071a(9) =712081a(10) =749911a(11) =795691a(12) =992251a(13) =1080721a(14) =1286731a(15) =1458271a(16) =1849471a(17) =2271061a(18) =2457691a(19) =3295381a(20) =3370771a(21) =3414841a(22) =3714751a(23) =4061971a(24) =4736491a(25) =5314051a(26) =5827081a(27) =6566911a(28) =6935083a(29) =7303981