Triangle T(n, k) read by rows, T(n, k) = n!*binomial(n, k).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =2a(6) =6a(7) =18a(8) =18a(9) =6a(10) =24a(11) =96a(12) =144a(13) =96a(14) =24a(15) =120a(16) =600a(17) =1200a(18) =1200a(19) =600a(20) =120a(21) =720a(22) =4320a(23) =10800a(24) =14400a(25) =10800a(26) =4320a(27) =720a(28) =5040a(29) =35280