27549

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 90 ones.at n=30A031858
• Continued fraction expansion for exp( Sum_{n>=1} 1/(n*A080040(n)) ), where A080040(n) = (1+sqrt(3))^n + (1-sqrt(3))^n.at n=22A174510
• Numbers k such that Sum_{i=1..k} i^sigma(i) == 0 (mod k).at n=8A227427