Squarefree parts of highly composite numbers (definition 1) (A002182).

Terms

a(0) =1a(1) =2a(2) =1a(3) =6a(4) =3a(5) =6a(6) =1a(7) =3a(8) =15a(9) =30a(10) =5a(11) =15a(12) =10a(13) =5a(14) =210a(15) =35a(16) =105a(17) =70a(18) =35a(19) =210a(20) =70a(21) =105a(22) =35a(23) =7a(24) =770a(25) =35a(26) =14a(27) =385a(28) =2310a(29) =770