Smallest number beginning with 7 and having exactly n prime divisors counted with multiplicity.

Terms

a(0) =7a(1) =74a(2) =70a(3) =708a(4) =72a(5) =729a(6) =704a(7) =7056a(8) =768a(9) =7776a(10) =7168a(11) =70656a(12) =71680a(13) =702464a(14) =73728a(15) =746496a(16) =720896a(17) =7225344a(18) =786432a(19) =7962624a(20) =7077888a(21) =71663616a(22) =70778880a(23) =700710912a(24) =75497472a(25) =764411904a(26) =704643072a(27) =7113539584a(28) =7046430720