Rencontres numbers: number of permutations of [n] with exactly one fixed point.
A000240
Rencontres numbers: number of permutations of [n] with exactly one fixed point.
Terms
- a(0) =1a(1) =0a(2) =3a(3) =8a(4) =45a(5) =264a(6) =1855a(7) =14832a(8) =133497a(9) =1334960a(10) =14684571a(11) =176214840a(12) =2290792933a(13) =32071101048a(14) =481066515735
External references
- oeis: A000240