Triangle T(n,k) = n!*binomial(n-1, k-1) for 1 <= k <= n, read by rows.

Terms

a(0) =1a(1) =2a(2) =2a(3) =6a(4) =12a(5) =6a(6) =24a(7) =72a(8) =72a(9) =24a(10) =120a(11) =480a(12) =720a(13) =480a(14) =120a(15) =720a(16) =3600a(17) =7200a(18) =7200a(19) =3600a(20) =720a(21) =5040a(22) =30240a(23) =75600a(24) =100800a(25) =75600a(26) =30240a(27) =5040a(28) =40320a(29) =282240