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

Terms

a(0) =75973a(1) =301513a(2) =2053393a(3) =3404053a(4) =4022573a(5) =5399123a(6) =6461473a(7) =8395613a(8) =9848813a(9) =11804173a(10) =14124133a(11) =15680573a(12) =17173333a(13) =20705533a(14) =23609083a(15) =28988353a(16) =30290563a(17) =32845633a(18) =35025943a(19) =36791813a(20) =39630803a(21) =42598663a(22) =43605943a(23) =44116333a(24) =53795083a(25) =54396533a(26) =54563693