40471600domain: NAppears in sequencesBase-7 digits are, in order, the first n terms of the periodic sequence with initial period 1,0,0.at n=9A033143Numbers of the form (7^{mr}-1)/(7^r-1) for positive integers m, r.at n=22A076286Sum of the cubes of the divisors of n^3.at n=6A258331