798336000

Appears in sequences

• a(n) = (n-1)*(n+1)!/6.at n=10A005990
• a(n) = (2*n - 2)*n!.at n=11A052609
• Generalized Stirling2 array (4,2).at n=26A090438
• Triangle read by rows: T(n,k) (n>=1, 3<=k<=n+2) is the number of k-sequences of balls colored with at most n colors such that exactly three balls are the same color as some other ball in the sequence.at n=54A292930