Numbers with 18 divisors.

Terms

a(0) =180a(1) =252a(2) =288a(3) =300a(4) =396a(5) =450a(6) =468a(7) =588a(8) =612a(9) =684a(10) =700a(11) =768a(12) =800a(13) =828a(14) =882a(15) =972a(16) =980a(17) =1044a(18) =1100a(19) =1116a(20) =1280a(21) =1300a(22) =1332a(23) =1452a(24) =1476a(25) =1548a(26) =1568a(27) =1575a(28) =1692a(29) =1700