Triangle read by rows: t(n,k)=Binomial[k*(n - k), n] 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 6, 6, 0, 0, 0, 0, 28, 84, 28, 0, 0, 0, 0, 120
1 seqfan posts