Smallest integer with exactly n semiprime divisors.

Terms

a(0) =1a(1) =4a(2) =12a(3) =30a(4) =60a(5) =180a(6) =210a(7) =420a(8) =1260a(9) =6300a(10) =2310a(11) =4620a(12) =13860a(13) =69300a(14) =485100a(15) =30030a(16) =60060a(17) =180180a(18) =900900a(19) =6306300a(20) =69369300a(21) =510510a(22) =1021020a(23) =3063060a(24) =15315300a(25) =107207100a(26) =1179278100a(27) =15330615300a(28) =9699690a(29) =19399380