A089523 - OEIS

A089523

Primes p such that mu(p+1) = 1; that is, p+1 is squarefree and has an even number of distinct prime factors, where mu is the Moebius function.

5, 13, 37, 61, 73, 157, 193, 277, 313, 389, 397, 421, 457, 461, 509, 541, 569, 613, 661, 673, 733, 757, 769, 797, 857, 877, 929, 997, 1093, 1109, 1153, 1201, 1213, 1217, 1229, 1237, 1289, 1301, 1321, 1381, 1409, 1429, 1453, 1481, 1553, 1609, 1621, 1657

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OFFSET

1,1

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

Eric Weisstein's World of Mathematics, Moebius Function

MAPLE

select(n -> isprime(n) and numtheory:-mobius(n+1)=1, [seq(i, i=1..2000, 4)]); # Robert Israel, Aug 16 2018

MATHEMATICA

Select[Prime[Range[300]], MoebiusMu[ #+1]==1&]

PROG

(PARI) isok(p) = isprime(p) && (moebius(p+1) == 1); \\ Michel Marcus, Aug 16 2018

(Magma) [p: p in PrimesUpTo(2000) | MoebiusMu(p+1) eq 1]; // Vincenzo Librandi, Aug 17 2018

CROSSREFS

Cf. A089495 (mu(p+1) for prime p), A049098 (primes p with mu(p+1)=0), A078329 (primes p with mu(p+1)=-1).

Sequence in context: A342475 A107144 A137815 * A375794 A058507 A111057

Adjacent sequences: A089520 A089521 A089522 * A089524 A089525 A089526

KEYWORD

nonn

AUTHOR

T. D. Noe, Nov 06 2003

STATUS

approved