10021590356domain: NAppears in sequencesa(n) = (7*2^n - 4(-1)^n)/3.at n=32A083595a(n) = (7*4^n - 4)/3.at n=16A083597Expansion of (1+2*x+3*x^2-x^3)/((1-x)*(1+x)*(1-2*x)*(1+2*x)).at n=32A221049