

A028742


Nonsquares mod 29.


1



2, 3, 8, 10, 11, 12, 14, 15, 17, 18, 19, 21, 26, 27
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..14.


EXAMPLE

Since 12 is not a perfect square and there are no solutions to x^2 = 12 mod 29, 12 is in the sequence.
Although 13 is not a perfect square either, there are solutions to x^2 = 13 mod 29, such as x = 10, x = 19, so 13 is not in the sequence.


MATHEMATICA

Complement[Range[0, 28], PowerMod[Range[29], 2, 29]] (* Alonso del Arte, Nov 29 2019 *)


PROG

(Scala) val squaresMod29 = (1 to 29).map(n => n * n).map(_ % 29)
(0 to 28).diff(squaresMod29) // Alonso del Arte, Nov 29 2019


CROSSREFS

Cf. A010391.
Sequence in context: A019307 A342849 A247580 * A028771 A023709 A317539
Adjacent sequences: A028739 A028740 A028741 * A028743 A028744 A028745


KEYWORD

nonn,fini,full


AUTHOR

N. J. A. Sloane


STATUS

approved



