851525

Appears in sequences

• Denominators of continued fraction convergents to sqrt(109).at n=14A041197
• Denominators of continued fraction convergents to sqrt(436).at n=14A041831
• Denominators of continued fraction convergents to sqrt(981).at n=14A042899
• 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=12A094049
• Smallest integer y satisfying the Pell equation x^2 - n*y^2 = -1 for the values of n given in A031396.at n=23A130227
• Second member of a pair of numbers occurring in the definition of 1-happy couples.at n=66A191861
• Second member S0(n) of the smallest positive pair (R0(n), S0(n)) for the n-th 1-happy number couple (B(n), C(n)).at n=65A263007