a(n) is the least number with exactly n noninfinitary square divisors.

Terms

a(0) =1a(1) =16a(2) =144a(3) =256a(4) =3600a(5) =1296a(6) =2304a(7) =65536a(8) =129600a(9) =16777216a(10) =32400a(11) =20736a(12) =57600a(13) =331776a(14) =589824a(15) =4294967296a(16) =6350400a(18) =150994944a(19) =810000a(20) =1587600a(21) =1679616a(22) =518400a(23) =5308416a(24) =2822400a(25) =84934656a(26) =8294400a(27) =26873856a(28) =14745600a(29) =21743271936a(30) =38654705664