1622400

Appears in sequences

• a(n) = n^2*(n+1)*(n+2)^2/6.at n=24A004256
• Triangle read by rows: T(n,k) is the number of partitions of the set {1,2,...,n} having exactly k blocks that contain both odd and even entries (0<=k<=floor(n/2)).at n=45A124418