%I A088179
%S A088179 2,7,11,23,47,59,83,107,167,179,211,227,263,331,347,359,383,463,467,479,
%T A088179 503,547,563,571,587,691,719,839,859,863,887,911,967,983,1019,1123,1187,
%U A088179 1231,1283,1291,1303,1307,1319,1327,1367,1439,1483,1487,1523,1619,1723
%N A088179 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.
%C A088179 It is an unsolved problem to determine if this sequence has a positive 
               density. - Pieter Moree (moree(AT)science.uva.nl), Nov 03 2003.
%H A088179 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               MoebiusFunction.html">Moebius Function</a>
%t A088179 Select[Prime[Range[400]], MoebiusMu[ #-1]==1&]
%Y A088179 Cf. A049092 (primes p with mu(p-1)=0), A078330 (primes p with mu(p-1)=-1), 
               A089451 (mu(p-1) for prime p).
%Y A088179 Cf. A002496.
%Y A088179 Sequence in context: A045373 A075431 A045374 this_sequence A031873 A075356 
               A103184
%Y A088179 Adjacent sequences: A088176 A088177 A088178 this_sequence A088180 A088181 
               A088182
%K A088179 nonn
%O A088179 1,1
%A A088179 N. J. A. Sloane (njas(AT)research.att.com) and T. D. Noe (noe(AT)sspectra.com), 
               Nov 03 2003