Numerator of Sum(k^mu(k): 1<=k<=n), where mu is the Moebius function (A008683).

Terms

a(0) =1a(1) =3a(2) =11a(3) =17a(4) =91a(5) =271a(6) =1927a(7) =2137a(8) =2347a(9) =4447a(10) =49127a(11) =51437a(12) =670991a(13) =1091411a(14) =1541861a(15) =1571891a(16) =26752177a(17) =27262687a(18) =518501563a(19) =528201253a(20) =731894743a(21) =945287923a(22) =21751321919a(23) =21974414789a(24) =22197507659a(25) =27997922279a(26) =28221015149