117496domain: NAppears in sequencesNumber of ways to sum numbers from 1 to n to the n-th prime.at n=25A067953a(n) = Sum_{k=1..n} k^3 * tau(k), where tau is A000005.at n=17A320895Expansion of g.f. Product_{k>=2} 1/(1-x^phi(k)).at n=28A347428Expansion of g.f. Product_{k>=2} 1/(1-x^phi(k)).at n=29A347428