Smallest k such that |M(k)| = n^2, where M(x) is Mertens's function A002321.

Terms

a(0) =1a(1) =31a(2) =443a(3) =1637a(4) =2803a(5) =9749a(6) =19111a(7) =24110a(8) =42833a(9) =59426a(10) =95514a(11) =230227a(12) =297335a(13) =297573a(14) =299129a(15) =355541a(16) =897531a(17) =924717a(18) =926173a(19) =1062397a(20) =1761649a(21) =1763079a(22) =1789062a(23) =3214693a(24) =3218010a(25) =3232958a(26) =4962865a(27) =5307549a(28) =5343710a(29) =6433477