Products of form p^4*q^2*r where p, q and r are three distinct primes.

Terms

a(0) =720a(1) =1008a(2) =1200a(3) =1584a(4) =1620a(5) =1872a(6) =2268a(7) =2352a(8) =2448a(9) =2736a(10) =2800a(11) =3312a(12) =3564a(13) =3920a(14) =4050a(15) =4176a(16) =4212a(17) =4400a(18) =4464a(19) =5200a(20) =5328a(21) =5508a(22) =5808a(23) =5904a(24) =6156a(25) =6192a(26) =6768a(27) =6800a(28) =7452a(29) =7500