411474

Appears in sequences

• Number of ways the set {1,2,...,n} can be split into three subsets of equal sums.at n=20A112972
• Irregular triangle read by rows where T(n,k) is the number of set partitions of {1,...,n} with all block-sums equal to d, where d is the k-th divisor of n*(n+1)/2 that is >= n.at n=66A320438