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a(n) is the least nonsquare having square residues modulo each of the first n primes.
1

%I #6 Oct 19 2017 03:14:27

%S 2,3,6,15,15,91,246,399,399,399,3045,3045,21099,41155,43059,182919,

%T 182919,182919,182919,860574,860574,8042479,8042479,11993466,11993466,

%U 11993466,78278655,78278655,78278655,78278655

%N a(n) is the least nonsquare having square residues modulo each of the first n primes.

%Y Cf. A002189, A018883.

%K nonn

%O 1,1

%A _Don Reble_, Feb 28 2004