Numbers k such that k*tau(k)>4*prime(k).

Terms

a(0) =840a(1) =1260a(2) =1440a(3) =1680a(4) =1800a(5) =1980a(6) =2016a(7) =2100a(8) =2160a(9) =2340a(10) =2400a(11) =2520a(12) =2640a(13) =2700a(14) =2880a(15) =3024a(16) =3120a(17) =3240a(18) =3360a(19) =3600a(20) =3696a(21) =3780a(22) =3960a(23) =4032a(24) =4080a(25) =4200a(26) =4320a(27) =4368a(28) =4536a(29) =4560