Smallest integer at which the value of truncated Mertens function equals 2^n.

Terms

a(0) =6a(1) =14a(2) =26a(3) =58a(4) =142a(5) =326a(6) =734a(7) =1713a(8) =3713a(9) =8057a(10) =17869a(11) =38985a(12) =84046a(13) =180010a(14) =385846a(15) =823687a(16) =1737474a(17) =3680099a(18) =7755978a(19) =16282918a(20) =34142786a(21) =71419857a(22) =148960009a(23) =310320958a(24) =645191390a(25) =1339363921a(26) =2777235410a(27) =5750237373a(28) =11891042257a(29) =24563702542