94836domain: NAppears in sequencesNumbers k such that the representation of k^2 is a substring of that of k!, in base 10.at n=12A113621Numbers k such that k and k^2 use only the digits 3, 4, 6, 8 and 9.at n=23A137129a(n) = 121*n^2 - n.at n=27A157960a(n) = 484*n^2 - 2*n.at n=13A158329a(n) = 784*n^2 - 28.at n=10A158657