A180013

Sequences linked to this entry ?

• A180013: Triangular array read by rows: T(n,k) = number of fixed points in the permutations of {1,2,...,n} that have exactly k cycles; n>=1, 1<=k<=n. identification, match triangle
  A028338 → x ↦ 2x−1
  1 · 0, 2 · 0, 3, 3 · 0, 8, 12, 4 … Σ 1, 2, 6, 24, 120, 720, 5040, 40320, …
  (−∞, 1/2]nonnegativerational roots