Smallest number beginning with 4 and having exactly n prime divisors counted with multiplicity.

Terms

a(0) =41a(1) =4a(2) =42a(3) =40a(4) =48a(5) =400a(6) =432a(7) =4000a(8) =4032a(9) =40000a(10) =4608a(11) =4096a(12) =41472a(13) =40960a(14) =49152a(15) =409600a(16) =442368a(17) =4063232a(18) =4128768a(19) =40310784a(20) =4718592a(21) =4194304a(22) =42467328a(23) =41943040a(24) =411041792a(25) =419430400a(26) =452984832a(27) =402653184a(28) =4076863488a(29) =4026531840