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 A040070 Primes p such that x^3 = 15 has no solution mod p. 3
 13, 19, 37, 43, 61, 73, 97, 103, 109, 127, 139, 151, 157, 163, 181, 193, 199, 211, 241, 271, 307, 313, 337, 349, 373, 379, 409, 421, 433, 439, 457, 487, 499, 523, 547, 577, 601, 607, 613, 619, 631, 661, 691, 709 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Complement of A040069 relative to A000040. - Vincenzo Librandi, Sep 17 2012 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 MATHEMATICA ok[p_]:= Reduce[Mod[x^3 - 15, p] == 0, x, Integers] == False; Select[Prime[Range[200]], ok] (* Vincenzo Librandi, Sep 17 2012 *) PROG (Magma) [p: p in PrimesUpTo(1000) | not exists{x : x in ResidueClassRing(p) | x^3 eq 15} ]; // Vincenzo Librandi, Sep 17 2012 CROSSREFS Sequence in context: A088186 A089490 A057749 * A322923 A048523 A307627 Adjacent sequences: A040067 A040068 A040069 * A040071 A040072 A040073 KEYWORD nonn,easy AUTHOR N. J. A. Sloane. STATUS approved

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Last modified May 21 17:21 EDT 2024. Contains 372738 sequences. (Running on oeis4.)