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A001390 Smallest multiplicative generator for quadratic residues mod prime(n). 2
1, 1, 4, 2, 3, 4, 2, 4, 2, 4, 7, 3, 2, 9, 2, 4, 3, 4, 4, 2, 6, 2, 3, 5, 2, 4, 2, 3, 12, 9, 9, 3, 2, 4, 4, 5, 3, 4, 2, 4, 3, 4, 2, 2, 4, 2, 4, 9, 3, 5, 7, 2, 3, 3, 9, 2, 4, 2, 7, 5, 6, 4, 7, 2, 2, 4, 5, 3, 3, 3, 9, 2, 2, 3, 4, 2, 4, 3, 2, 2, 3, 4, 5, 6, 5, 3, 2, 3, 4, 2, 3, 2, 2, 4, 5, 2, 4, 2, 4, 4, 4, 4, 3, 2, 5, 17 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

MAPLE

f:= proc(p) local x;

  for x from 1 do if numtheory:-order(x, p) = (p-1)/2 then return x fi od

end proc:

f(2):= 1:

seq(f(ithprime(n)), n=1..1000); # Robert Israel, Jan 14 2016

CROSSREFS

Cf. A000040.

Sequence in context: A183993 A184403 A198120 * A180343 A332273 A225001

Adjacent sequences:  A001387 A001388 A001389 * A001391 A001392 A001393

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from David W. Wilson, Aug 15 1996

Offset changed by Robert Israel, Jan 14 2016

STATUS

approved

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Last modified July 15 15:15 EDT 2020. Contains 335774 sequences. (Running on oeis4.)