A090983 a(n) is the least nonsquare having square residues modulo each of the first n primes.
2, 3, 6, 15, 15, 91, 246, 399, 399, 399, 3045, 3045, 21099, 41155, 43059, 182919, 182919, 182919, 182919, 860574, 860574, 8042479, 8042479, 11993466, 11993466, 11993466, 78278655, 78278655, 78278655, 78278655
Offset: 1