711900domain: NAppears in sequencesa(n) = n^2*(n^2 + 1)*(n-1).at n=15A037250Numbers whose set of base 15 digits is {0,E}, where E base 15 = 14 base 10.at n=20A097261a(n) = 3600*n^2 - 6751*n + 3165.at n=14A157824Expansion of e.g.f. exp(Sum_{k>=1} phi(k)^2 * x^k/k), where phi is the Euler totient function A000010.at n=8A377507