536879104domain: NAppears in sequencesa(n) = (4^n + 4^[ n/2 ] )/2.at n=13A001446Dirichlet convolution of powers of 2 (2,4,8,...) with themselves.at n=26A034713a(n) = 2*4^n + (-1)^n*2^(n-1).at n=13A120470a(n) = n^7*(n^8 + 1)/2.at n=4A168665