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

Terms

a(0) =1a(1) =0a(2) =1a(3) =0a(4) =2a(5) =6a(6) =0a(7) =6a(8) =24a(9) =60a(10) =0a(11) =24a(12) =120a(13) =360a(14) =840a(15) =0a(16) =120a(17) =720a(18) =2520a(19) =6720a(20) =15120a(21) =0a(22) =720a(23) =5040a(24) =20160a(25) =60480a(26) =151200a(27) =332640a(28) =0a(29) =5040