75960

Appears in sequences

• Numbers k that divide sigma(k)-phi(k).at n=5A055681
• Expansion of q^(-1/3) * (eta(q^3) / eta(q))^4 in powers of q.at n=15A128758
• a(n) is the smallest number k such that sigma(k) - phi(k) = n*k, or 0 if no such k exists.at n=3A291258