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A192452 Numbers n such that -1 is not a 4th power mod n. 1
3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 38, 39, 40, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Complement of A192453.

LINKS

Table of n, a(n) for n=1..66.

MATHEMATICA

Table[If[Reduce[x^4==-1, Modulus->n]===False, n], {n, 2, 300}]//Union

CROSSREFS

Sequence in context: A179005 A026505 A029674 * A132147 A118955 A191838

Adjacent sequences:  A192449 A192450 A192451 * A192453 A192454 A192455

KEYWORD

nonn

AUTHOR

José María Grau Ribas, Jul 01 2011

STATUS

approved

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Last modified November 25 14:47 EST 2020. Contains 338625 sequences. (Running on oeis4.)