52116
domain: N
Appears in sequences
- Numerator of ratio (the denominator being (n-1)!^2 = A001044(n-1)) giving the probability that the last of n persons drawing names randomly from a set of names draws their own, given that each person previously has drawn in succession and did not keep their own name. (Probability of derangements when allocated / rejected sequentially.)at n=6A136300
- a(n) = 102*2^n - 108 (n>=1).at n=8A304830