Smallest value of x such that M(x) = -n, where M(x) is Mertens's function A002321.

Terms

a(0) =3a(1) =5a(2) =13a(3) =31a(4) =110a(5) =114a(6) =197a(7) =199a(8) =443a(9) =659a(10) =661a(11) =665a(12) =1105a(13) =1106a(14) =1109a(15) =1637a(16) =2769a(17) =2770a(18) =2778a(19) =2791a(20) =2794a(21) =2795a(22) =2797a(23) =2802a(24) =2803a(25) =6986a(26) =6987a(27) =7013a(28) =7021a(29) =9717