16781472domain: NAppears in sequencesa(n) = Sum_{d|8} phi(d)*n^(8/d).at n=8A054607a(n) = Sum_{d|n} phi(d)*8^(n/d).at n=8A054615Triangle T(n,k) = Sum_{d|n} phi(d)*k^(n/d).at n=35A054618Triangle T(n,k) = Sum_{d|k} phi(d)*n^(k/d).at n=35A054619a(n) = Sum_{d|n} phi(d)*n^(n/d).at n=8A228640