303038464domain: NAppears in sequencesa(n) = (2*n-8)^2 * 2^(n-3).at n=21A135466a(n+6) = 6*a(n+4) - 12*a(n+2) + 8*a(n), a(0)..a(5) = 8,0,9,0,8,0.at n=42A243456