224664

Appears in sequences

• Numbers k such that sigma(k+1) = 5*phi(k).at n=17A067263
• a(n) = (1/2) * Sum_{|k|<=2*sqrt(p)} k^8*H(4*p-k^2) where H() is the Hurwitz class number and p is n-th prime.at n=3A297493