Number of permutations of {1,2,...,n} that have no odd fixed points.
A161131
Number of permutations of {1,2,...,n} that have no odd fixed points.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =3a(4) =14a(5) =64a(6) =426a(7) =2790a(8) =24024a(9) =205056a(10) =2170680a(11) =22852200a(12) =287250480a(13) =3597143040a(14) =52370755920a(15) =760381337520
External references
- oeis: A161131