Legendre-Stirling permutations

  • Authors:
  • Eric S. Egge

  • Affiliations:
  • Department of Mathematics, Carleton College, Northfield, MN 55057, USA

  • Venue:
  • European Journal of Combinatorics
  • Year:
  • 2010

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Abstract

We first give a combinatorial interpretation of Everitt, Littlejohn, and Wellman's Legendre-Stirling numbers of the first kind. We then give a combinatorial interpretation of the coefficients of the polynomial (1-x)^3^k^+^1@?"n"="0^~{{n+kn}}x^n analogous to that of the Eulerian numbers, where {{nk}}are Everitt, Littlejohn, and Wellman's Legendre-Stirling numbers of the second kind. Finally we use a result of Bender to show that the limiting distribution of these coefficients as n approaches infinity is the normal distribution.