306986431845
domain: N
Appears in sequences
- a(n) = floor((1/n)*(S(n,1) + S(n,2) + ... + S(n,n))), where S(i,j) are Stirling numbers of second kind.at n=18A024426
- a(n) = (b(p)-2)/p where b(k) denotes Bell numbers and p = prime(n).at n=7A079609
- Number of n-bead necklace structures using an infinite alphabet that are not self-equivalent under a nonzero rotation.at n=19A327696