Numerator of Product_{d|n} b(d)^Moebius(n/d), where b() = A100371().

Terms

a(0) =1a(1) =1a(2) =3a(3) =3a(4) =15a(5) =1a(6) =63a(7) =5a(8) =21a(9) =1a(10) =1023a(11) =5a(12) =4095a(13) =1a(14) =17a(15) =17a(16) =65535a(17) =1a(18) =262143a(19) =17a(20) =65a(21) =1a(22) =4194303a(23) =17a(24) =69905a(25) =1a(26) =4161a(27) =65a(28) =268435455a(29) =1