8890182

Appears in sequences

• Numerators of continued fraction convergents to sqrt(109).at n=14A041196
• Let p(n) be the n-th prime congruent to 1 mod 4. Then a(n) = the least m for which m^2+1=p(n)*k^2 has a solution.at n=12A094048
• Smallest integer x satisfying the Pell equation x^2-k*y^2=-1 for the values of k given in A031396.at n=23A130226
• First member of a pair of numbers occurring in the definition of 1-happy couples.at n=66A191860
• Value x in the solution of x^2-D*y^2=-1 as D runs through A003654.at n=21A249021
• First member R0(n) of the smallest positive pair (R0(n), S0(n)) for the n-th 1-happy number couple (B(n), C(n)).at n=65A263006