128790

Appears in sequences

• Numbers k such that k | sigma_11(k) - phi(k)^11.at n=23A055705
• G.f.: 1/(1 - x/(1 - x^4/(1 - x^7/(1 - x^10/(1 - x^13/(1 - x^16/(1 -...- x^(3*n-2)/(1 -...)))))))), a continued fraction.at n=38A206737