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

Terms

a(0) =0a(1) =0a(2) =0a(3) =3a(4) =3a(5) =0a(6) =20a(7) =20a(8) =16a(9) =0a(10) =115a(11) =115a(12) =110a(13) =90a(14) =0a(15) =714a(16) =714a(17) =708a(18) =684a(19) =576a(20) =0a(21) =5033a(22) =5033a(23) =5026a(24) =4998a(25) =4872a(26) =4200a(27) =0a(28) =40312a(29) =40312