137439084544domain: NAppears in sequencesa(n) = (4^n + 4^[ n/2 ] )/2.at n=17A001446a(n) = 2*4^n + (-1)^n*2^(n-1).at n=17A120470a(n) = n^9*(n^10 + 1)/2.at n=4A170792