Hi. I'm really struggling with this generating function problem. Any help would be greatly appreciated. Question: Find the generating function for the compositions (c1,c2,c3....,ck) such that for each i, ci is an odd integer at least 2i-1. Second part of question: Use the above solution to to find the number of compositions of a positive integer n into k parts (c1,c2...ck) such that for each i, ci is an odd integer at least 2i -1.