Restricted Dumont permutations
classification
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keywords
dumontnumberspatternspermutationsanalyzeavoidingcardinalitiescatalan
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We analyze the structure and enumerate Dumont permutations of the first and second kinds avoiding certain patterns or sets of patterns of length 3 and 4. Some cardinalities are given by Catalan numbers, powers of 2, little Schroeder numbers, and other known or related sequences.
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