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A028754 Nonsquares mod 41. 0
3, 6, 7, 11, 12, 13, 14, 15, 17, 19, 22, 24, 26, 27, 28, 29, 30, 34, 35, 38 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..20.

EXAMPLE

x^2 = 7 mod 41 has no solutions, so 7 is in the sequence.

x^2 = 8 mod 41 has the solutions x = 7 and x = 34. Hence 8 is not in the sequence.

MATHEMATICA

Complement[Range[40], PowerMod[Range[41], 2, 41]] (* Alonso del Arte, Jan 12 2017 *)

CROSSREFS

Sequence in context: A115127 A258354 A292608 * A028795 A004780 A292046

Adjacent sequences:  A028751 A028752 A028753 * A028755 A028756 A028757

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified April 23 03:26 EDT 2019. Contains 322380 sequences. (Running on oeis4.)