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 A053444 x^2 + y^2 mod A053443(n) does not take on value a(n). 2

%I

%S 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,7,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,7,

%T 3,3,3,3,3,3,3,3,11,3,3,3,3,3,3,3,3,7,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,

%U 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,11,3,3,7,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3

%N x^2 + y^2 mod A053443(n) does not take on value a(n).

%H Antti Karttunen, <a href="/A053444/b053444.txt">Table of n, a(n) for n = 1..5000</a>

%o (PARI)

%o A053444list(up_to) = { my(v=vector(up_to),t,n=1,i=0); while(i<up_to,my(u=vector(n),ind); for(x=0, (n+1)\2, for(y=0, x, u[((x^2+y^2)%n)+1]=1)); if(0==vecmin(u,&ind), i++; v[i] = ind-1); n++); (v); };

%o v053444 = A053444list(up_to);

%o A053444(n) = v053444[n]; \\ _Antti Karttunen_, Nov 07 2018

%Y Cf. A053443.

%K nonn

%O 1,1

%A _David W. Wilson_

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Last modified August 9 05:12 EDT 2020. Contains 336319 sequences. (Running on oeis4.)