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A136804
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Nonsquares mod 257.
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2
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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
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OFFSET
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1,1
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COMMENTS
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Because 257 is a Fermat prime, these numbers are all primitive roots (mod 257). Complement of A136803.
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LINKS
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Nathaniel Johnston, Table of n, a(n) for n = 1..128 (full sequence)
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FORMULA
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a(n) + a(129-n) = 257.
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MAPLE
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A136804 := {$(0..256)}: for n from 0 to 256 do A136804 := A136804 minus {n^2 mod 257}: od: op(sort(convert(A136804, list))); # Nathaniel Johnston, Jun 23 2011
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MATHEMATICA
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p=257; Select[Range[0, p-1], JacobiSymbol[ #, p]==-1&]
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CROSSREFS
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Sequence in context: A047328 A028811 A034035 * A129802 A023854 A092559
Adjacent sequences: A136801 A136802 A136803 * A136805 A136806 A136807
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KEYWORD
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fini,full,easy,nonn
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AUTHOR
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T. D. Noe, Jan 22 2008
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STATUS
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approved
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