ar X iv : m at h / 01 05 07 3 v 2 [ m at h . C O ] 2 A ug 2 00 1 COUNTING OCCURRENCES OF 132 IN A PERMUTATION
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چکیده
We study the generating function for the number of permutations on n letters containing exactly r > 0 occurrences of 132. It is shown that finding this function for a given r amounts to a routine check of all permutations in S2r . 2000 Mathematics Subject Classification: Primary 05A05, 05A15; Secondary 05C90
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تاریخ انتشار 2008