Evaluate the Series \( \dfrac{1}{3^1}+\dfrac{4}{3^2}+\dfrac{7}{3^3}+\dfrac{10}{3^4}+\cdots\)
sumfor(n, 0, infinity, (3*n+1) / (3^(n+1)) = 5/4 = 1 1/4
+49 
