385645

Appears in sequences

• Denominators of continued fraction convergents to sqrt(157).at n=16A041289
• Denominators of continued fraction convergents to sqrt(628).at n=12A042205
• Let p(n) be the n-th prime congruent to 1 mod 4. Then a(n) = the least k for which m^2+1=p(n)*k^2 has a solution.at n=16A094049
• Smallest integer y satisfying the Pell equation x^2 - n*y^2 = -1 for the values of n given in A031396.at n=31A130227