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A049553 Primes p such that x^21 = 2 has a solution mod p. +0
2
2, 3, 5, 11, 17, 23, 31, 41, 47, 53, 59, 83, 89, 101, 107, 109, 131, 137, 149, 157, 167, 173, 179, 191, 223, 227, 229, 233, 251, 257, 263, 269, 277, 283, 293, 307, 311, 317, 347, 353, 359, 383, 389, 397, 401, 419, 431, 433, 439, 443, 457, 461, 467, 479, 499 (list; graph; listen)
OFFSET

1,1

LINKS

R. J. Mathar, Table of n, a(n) for n = 1..1000

Index entries for related sequences

CROSSREFS

Sequence in context: A103664 A129942 A113239 this_sequence A049595 A107438 A023206

Adjacent sequences: A049550 A049551 A049552 this_sequence A049554 A049555 A049556

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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