34368126976domain: NAppears in sequencesa(n) = (8^n + 4^n)/2.at n=12A081337Expansion of (1-x-4x^2)/((1-2x)(1-8x^2)).at n=24A098657a(n) = n^6*(n^3 + 1)/2.at n=16A168555a(n) = n^8*(n^4 + 1)/2.at n=8A170776