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A Wilf Class Composed of 7 Symmetry Classes of Triples of 4-Letter Patterns |
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PP: 19-26 |
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doi:10.18576/jant/050104
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Author(s) |
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David Callan,
Toufik Mansour,
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Abstract |
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| In this paper, we make a contribution to the enumeration of permutations avoiding a triple of 4-letter patterns by establishing a Wilf class composed of 7 symmetry classes.
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