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Search: id:A088179
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| A088179 |
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Primes p such that mu(p-1) = 1; that is, p-1 is square-free and has an even number of prime factors, where mu is the Moebius function. |
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+0
5
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| 2, 7, 11, 23, 47, 59, 83, 107, 167, 179, 211, 227, 263, 331, 347, 359, 383, 463, 467, 479, 503, 547, 563, 571, 587, 691, 719, 839, 859, 863, 887, 911, 967, 983, 1019, 1123, 1187, 1231, 1283, 1291, 1303, 1307, 1319, 1327, 1367, 1439, 1483, 1487, 1523, 1619, 1723
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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It is an unsolved problem to determine if this sequence has a positive density. - Pieter Moree (moree(AT)science.uva.nl), Nov 03 2003.
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LINKS
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Eric Weisstein's World of Mathematics, Moebius Function
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MATHEMATICA
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Select[Prime[Range[400]], MoebiusMu[ #-1]==1&]
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CROSSREFS
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Cf. A049092 (primes p with mu(p-1)=0), A078330 (primes p with mu(p-1)=-1), A089451 (mu(p-1) for prime p).
Cf. A002496.
Adjacent sequences: A088176 A088177 A088178 this_sequence A088180 A088181 A088182
Sequence in context: A045373 A075431 A045374 this_sequence A031873 A075356 A103184
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com) and T. D. Noe (noe(AT)sspectra.com), Nov 03 2003
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