Numbers n such that phi(n) = 3*phi(n+1).

Terms

a(0) =119a(1) =527a(2) =545a(3) =2849a(4) =3689a(5) =4487a(6) =6649a(7) =18619a(8) =26771a(9) =30377a(10) =44659a(11) =47585a(12) =50507a(13) =76997a(14) =83021a(15) =102167a(16) =112463a(17) =128933a(18) =138773a(19) =163877a(20) =174437a(21) =192881a(22) =193115a(23) =198263a(24) =217967a(25) =236441a(26) =243827a(27) =244001a(28) =254539a(29) =268067