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A136804 Nonsquares mod 257. +0
2
3, 5, 6, 7, 10, 12, 14, 19, 20, 24, 27, 28, 33, 37, 38, 39, 40, 41, 43, 45, 47, 48, 51, 53, 54, 55, 56, 63, 65, 66, 69, 71, 74, 75, 76, 77, 78, 80, 82, 83, 85, 86, 87, 90, 91, 93, 94, 96, 97, 101, 102, 103, 105, 106, 107, 108, 109, 110, 112, 115, 119, 125, 126, 127, 130, 131 (list; graph; listen)
OFFSET

1,1

COMMENT

Because 257 is a Fermat prime, these numbers are all primitive roots (mod 257). Complement of A136803.

FORMULA

a(n) + a(129-n) = 257.

MATHEMATICA

p=257; Select[Range[0, p-1], JacobiSymbol[ #, p]==-1&]

CROSSREFS

Adjacent sequences: A136801 A136802 A136803 this_sequence A136805 A136806 A136807

Sequence in context: A047328 A028811 A034035 this_sequence A129802 A023854 A092559

KEYWORD

fini,nonn

AUTHOR

T. D. Noe (noe(AT)sspectra.com), Jan 22 2008

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Last modified January 7 17:35 EST 2009. Contains 152824 sequences.


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