Numbers that have more biquadratefree divisors than any smaller number.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =12a(5) =24a(6) =36a(7) =60a(8) =120a(9) =180a(10) =360a(11) =840a(12) =1260a(13) =2520a(14) =6300a(15) =7560a(16) =12600a(17) =27720a(18) =69300a(19) =83160a(20) =138600a(21) =360360a(22) =900900a(23) =1081080a(24) =1801800a(25) =5405400a(26) =12612600a(27) =18378360a(28) =30630600a(29) =91891800