623531domain: NPropertiesPrimalityPrimeyesAppears in sequencesRow sums a(n) of triangle A213936: number of representative necklaces with n beads (C_N symmetry) corresponding to all color signatures given by the partitions [1^n], [2,1^(n-2)], ..., [n-1,1], [n].at n=9A213937Prime numbersat n=50869