Hi all;

Let $\displaystyle a_{1}=a_{3}=0 $ and $\displaystyle a_{0} $\neq$0 $and $\displaystyle a_{2} $\neq$0$

and $\displaystyle a_{n} =\frac{a_{n-4}}{n(n-2)} ; n\geq4$

I need the general formula for the following summation in terms of $\displaystyle a_{0}$ and $\displaystyle a_{2}$:

$\displaystyle y=\sum_{i=1}^{\infty}a_{n}x^n$

Thanks