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 A028442 Numbers n such that Mertens's function M(n) (A002321) is zero. 18
 2, 39, 40, 58, 65, 93, 101, 145, 149, 150, 159, 160, 163, 164, 166, 214, 231, 232, 235, 236, 238, 254, 329, 331, 332, 333, 353, 355, 356, 358, 362, 363, 364, 366, 393, 401, 403, 404, 405, 407, 408, 413, 414, 419, 420, 422, 423, 424, 425, 427 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Seiichi Manyama, Table of n, a(n) for n = 1..10000 (terms 1..5361 from T. D. Noe) Eric Weisstein's World of Mathematics, Mertens Function MATHEMATICA Select[Range[500], Plus@@MoebiusMu[Range[#]] == 0 &] (* Alonso del Arte, Jul 06 2004 *) PROG (Perl) use ntheory ":all"; for (moebius(1, 1e7)) { ++\$i; say \$i unless \$M+=\$_; } # Dana Jacobsen, May 22 2015 (PARI) isok(n) = sum(k=1, n, moebius(k)) == 0; \\ Michel Marcus, Nov 20 2017 CROSSREFS Cf. A002321, A118684, A171096. Sequence in context: A263374 A066244 A055689 * A062982 A042801 A078733 Adjacent sequences:  A028439 A028440 A028441 * A028443 A028444 A028445 KEYWORD nonn AUTHOR STATUS approved

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Last modified October 20 12:47 EDT 2019. Contains 328257 sequences. (Running on oeis4.)