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A049550
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Primes p such that x^18 = 2 has a solution mod p.
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5
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2, 17, 23, 31, 41, 47, 71, 89, 113, 127, 137, 167, 191, 223, 233, 239, 257, 263, 281, 311, 353, 359, 383, 401, 431, 439, 449, 457, 479, 503, 521, 569, 593, 599, 601, 617, 641, 647, 719, 727, 743, 761, 809, 839, 857, 863, 881, 887, 911, 929, 953, 977, 983
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Coincides with sequence of primes p such that x^54 = 2 has a solution mod p for the first 167 terms (and then diverges).
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LINKS
| R. J. Mathar, Table of n, a(n) for n = 1..1000
Index entries for related sequences
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PROG
| (PARI) forprime(p=2, 2000, if([]~!=polrootsmod(x^18-2, p), print1(p, ", "))); print();
/* Joerg Arndt, Jul 27 2011 */
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CROSSREFS
| Sequence in context: A126961 A106622 A040992 * A049574 A018643 A094668
Adjacent sequences: A049547 A049548 A049549 * A049551 A049552 A049553
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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