Numbers with prime factorization pqr^3s^4.

Terms

a(0) =15120a(1) =22680a(2) =23760a(3) =28080a(4) =33264a(5) =35640a(6) =36720a(7) =39312a(8) =41040a(9) =42000a(10) =42120a(11) =49680a(12) =49896a(13) =51408a(14) =55080a(15) =57456a(16) =58968a(17) =61560a(18) =61776a(19) =62640a(20) =66000a(21) =66960a(22) =69552a(23) =74520a(24) =77112a(25) =78000a(26) =79920a(27) =80784a(28) =82320a(29) =86184