English

Integer sequences and k-commuting permutations

Combinatorics 2015-12-01 v4

Abstract

Let β\beta be any permutation on nn symbols and let c(k,β)c(k, \beta) be the number of permutations that kk-commute with β\beta. The cycle type of a permutation β\beta is a vector (c1,,cn)(c_1, \dots, c_n) such that β\beta has exactly cic_i cycles of length ii in its disjoint cycle factorization. In this article we obtain formulas for c(k,β)c(k, \beta), for some cycle types. We also express these formulas in terms of integer sequences as given in "The On-line Encyclopedia of Integer Sequences" (OEIS). For some of these sequences we obtain either new interpretations or relationships with sequences in the OEIS database.

Keywords

Cite

@article{arxiv.1406.3081,
  title  = {Integer sequences and k-commuting permutations},
  author = {Luis Manuel Rivera},
  journal= {arXiv preprint arXiv:1406.3081},
  year   = {2015}
}

Comments

20 pages, 8 tables. In the second version some paragraphs and proofs were rewritten. V3 is a revised version, one reference added. V4 is the published version

R2 v1 2026-06-22T04:36:35.997Z