56183135190domain: NAppears in sequencesNumber of necklaces of partitions of n+1 labeled beads.at n=12A000629a(n) = Sum_{k>=0} k^n/2^k.at n=12A076726a(n) = Sum_{k>=1} k^(2*n)/(2^k).at n=6A227044The number of rooted chains of reflexive matrices of order n.at n=4A329911