Number of excedances in all even permutations of {1,2,...,n} with no fixed points.
A145887
Number of excedances in all even permutations of {1,2,...,n} with no fixed points.
Terms
- a(0) =0a(1) =0a(2) =3a(3) =6a(4) =60a(5) =390a(6) =3255a(7) =29652a(8) =300384a(9) =3337380a(10) =40382595a(11) =528644490a(12) =7445077068a(13) =112248853626
External references
- oeis: A145887