Number of permutations of n elements with at most one fixed point.
A212291
Number of permutations of n elements with at most one fixed point.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =5a(4) =17a(5) =89a(6) =529a(7) =3709a(8) =29665a(9) =266993a(10) =2669921a(11) =29369141a(12) =352429681a(13) =4581585865a(14) =64142202097a(15) =962133031469
External references
- oeis: A212291