28987537806domain: NAppears in sequencesNumber of n-member subsets of [n^2] whose elements sum to a multiple of n.at n=9A318477Number of n-member subsets of [9*n] whose elements sum to a multiple of nine.at n=9A318597Number of 9-member subsets of [9*n] whose elements sum to a multiple of n.at n=9A318630