279920domain: NAppears in sequencesMonotonic ordering of nonnegative differences 6^i-4^j, for 40>= i>=0, j>=0.at n=38A192164a(n) = n! if n <= 3, otherwise a(n) = 2*(a(n-1) + a(n-3)) + a(n-2).at n=14A224232