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

Terms

a(0) =3600a(1) =7056a(2) =8100a(3) =15876a(4) =17424a(5) =19600a(6) =22500a(7) =24336a(8) =39204a(9) =41616a(10) =48400a(11) =51984a(12) =54756a(13) =67600a(14) =76176a(15) =86436a(16) =93636a(17) =94864a(18) =99225a(19) =115600a(20) =116964a(21) =121104a(22) =122500a(23) =132496a(24) =138384a(25) =144400a(26) =171396a(27) =197136a(28) =211600a(29) =226576