279480domain: NAppears in sequencesLeast k such that the least factor of k^Phi(k) -1 is the n-th prime.at n=34A066732Expansion of Product_{k>=1} 1 / (1 - k*x^k)^k.at n=14A266941Scaled g.f. T(u) = Sum_{n>=0} a(n)*(u/16)^n satisfies 5*(21*u-16)*T + d/du( 4*u*(u-1)*(27*u-32)*T') = 0, and a(0)=1; sequence gives a(n).at n=5A318495