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%I #8 May 13 2013 01:54:10
%S 2,7,23,23,71,71,311,311,311,311,479,479,1559,1559,1559,1559,5711,
%T 5711,10559,10559,10559,10559,18191,18191,18191,18191,18191,18191,
%U 31391,31391,366791,366791,366791,366791,366791,366791,366791,366791,366791
%N Smallest prime p modulo which numbers 1,2,...,n are quadratic residues.
%C The same primes without repetitions are listed in A147970.
%H Charles R Greathouse IV, <a href="/A147969/b147969.txt">Table of n, a(n) for n = 1..100</a>
%o (PARI) a(n)=forprime(p=2,default(primelimit),forprime(i=2,n, if(kronecker(i,p)<1,next(2)));return(p)) \\ _Charles R Greathouse IV_, Apr 06 2012
%Y Cf. A000229, A002223, A002224, A045535, A053760, A133435, A147970, A147971.
%K nonn
%O 1,1
%A _Max Alekseyev_, Nov 18 2008