468559domain: NAppears in sequencesa(n) = 10^n - 9^n.at n=6A016189Nexus numbers (n+1)^6 - n^6.at n=9A022522a(n) = 10^n mod 9^n.at n=6A139739Difference of two positive 6th powers.at n=31A181125Monotonic ordering of nonnegative differences 10^i-3^j, for 40>=i>=0, j>=0.at n=36A192160