%I #12 Jan 05 2019 05:17:01
%S 219,220,222,226,546,551,552,557,558,561,563,564,577,578,599,600,926,
%T 927,928,930,931,932,937,939,940,959,960,961,965,967,968,1347,1348,
%U 1378,1381,1447,1448,1449,1450,1469,1470,1473,1477,1479,1480,1482,1486,1943,1944,1946,1963
%N Solutions to the equation M(n) = 4 (M = Mertens's function A002321).
%H Seiichi Manyama, <a href="/A171406/b171406.txt">Table of n, a(n) for n = 1..10000</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/MertensFunction.html">Mertens Function</a>
%Y Cf. A002321.
%K nonn
%O 1,1
%A Neven Juric (neven.juric(AT)apis-it.hr), Sep 29 2010
%E More terms from _Seiichi Manyama_, Jan 05 2019