## Abstract

Let 𝑆𝑛 be the symmetric group of all permutations of 𝑛 letters. We show that there

are precisely 27 (respectively, 15) Wilf classes consisting of exactly 3 (respectively, 4) symmetry classes of subsets of four 4-letter patterns.

are precisely 27 (respectively, 15) Wilf classes consisting of exactly 3 (respectively, 4) symmetry classes of subsets of four 4-letter patterns.

Original language | English |
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Pages (from-to) | 115-130 |

Number of pages | 16 |

Journal | Notes on Number Theory and Discrete Mathematics |

Volume | 24 |

Issue number | 3 |

DOIs | |

State | Published - 2018 |