Numbers n such that sigma(n)/phi(n) = 9/4.

Terms

a(0) =51a(1) =477a(2) =595a(3) =3567a(4) =17765a(5) =20735a(6) =41615a(7) =104931a(8) =276651a(9) =470721a(10) =493493a(11) =599169a(12) =834591a(13) =993395a(14) =1092845a(15) =1242505a(16) =1318521a(17) =1479981a(18) =1490645a(19) =1712037a(20) =2344045a(21) =2736305a(22) =2912463a(23) =2986941a(24) =2990709a(25) =3042873a(26) =3187917a(27) =3277611a(28) =3295821a(29) =3767331