Numbers of the form p^3*q^2*r*s where p, q, r, and s are distinct primes.

Terms

a(0) =2520a(1) =3780a(2) =3960a(3) =4200a(4) =4680a(5) =5544a(6) =5880a(7) =5940a(8) =6120a(9) =6552a(10) =6600a(11) =6840a(12) =7020a(13) =7800a(14) =8280a(15) =8316a(16) =8568a(17) =9180a(18) =9450a(19) =9576a(20) =9828a(21) =10200a(22) =10260a(23) =10296a(24) =10440a(25) =10500a(26) =11160a(27) =11400a(28) =11592a(29) =12420