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A038894 Primes p such that 21 is not a square mod p. +0
1
2, 11, 13, 19, 23, 29, 31, 53, 61, 71, 73, 97, 103, 107, 113, 137, 139, 149, 157, 179, 181, 191, 197, 199, 223, 229, 233, 239, 241, 263, 271, 281, 283, 307, 313, 317, 347, 349, 359, 367, 389, 397, 401, 409, 431 (list; graph; listen)
OFFSET

1,1
CROSSREFS

Sequence in context: A079132 A023257 A068807 this_sequence A103803 A095743 A106984

Adjacent sequences: A038891 A038892 A038893 this_sequence A038895 A038896 A038897

KEYWORD

nonn

AUTHOR

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

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Last modified December 5 23:38 EST 2009. Contains 170428 sequences.

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