Number of permutations of n elements with an even number of fixed points.
A062282
Number of permutations of n elements with an even number of fixed points.
Terms
- a(0) =1a(1) =0a(2) =2a(3) =2a(4) =16a(5) =64a(6) =416a(7) =2848a(8) =22912a(9) =205952a(10) =2060032a(11) =22659328a(12) =271913984a(13) =3534877696a(14) =49488295936a(15) =742324422656
External references
- oeis: A062282