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Jan 15, 2018 at 16:33 vote accept sayantan dasgupta
Jan 15, 2018 at 9:59 comment added sayantan dasgupta Yeah thank you. I have the book " Discrete and combinatorial mathematics" by Grimaldi. I've read a few pages of it and am quite enjoying it
Jan 15, 2018 at 9:57 comment added Per Alexandersson @sayantandasgupta try perhaps Enumerative Combinatorics I by R. Stanley, or the combinatorics book by Grimaldi. A basic understanding of generating functions and how to produce these from recurrences is what is needed, and from there, solutions to problems as above becomes standard (the above could be a finals problem on a graduate course in enumerative combinatorics).
Jan 15, 2018 at 3:57 comment added Gjergji Zaimi @sayantandasgupta I believe math.stackexchange has a wealth of introductory enumerative problems, either with recurrences or bijections, so I suggest browsing their "recurrence relatons" tag. Good luck!
Jan 15, 2018 at 3:54 comment added sayantan dasgupta Thanks. Can you suggest me some good sites for learning more about recurrence related counting problems
Jan 15, 2018 at 3:50 history answered Gjergji Zaimi CC BY-SA 3.0