Recent content by SACHIN KUMAR

<Moderator's note: Approved as it is more than two weeks since the OP has been seen. Member has been warned not to post full solutions. This is an exception as it closes the thread.> Let's start from your reccurence relation: ##A_{n+2}=\frac{-A_N}{(n+2)(n+1)}## First collect even ##n##...