Triangle T(n,m)= A141686(n,m)*(m-1)! read by rows, n>=1, 1<=m<=n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =8a(5) =2a(6) =1a(7) =33a(8) =66a(9) =6a(10) =1a(11) =104a(12) =792a(13) =624a(14) =24a(15) =1a(16) =285a(17) =6040a(18) =18120a(19) =6840a(20) =120a(21) =1a(22) =720a(23) =35730a(24) =289920a(25) =428760a(26) =86400a(27) =720a(28) =1a(29) =1729