Triangle T(n,k) represents the coefficients of (x^17*d/dx)^n, where n=1,2,3,...

Terms

a(0) =1a(1) =17a(2) =1a(3) =561a(4) =51a(5) =1a(6) =27489a(7) =3111a(8) =102a(9) =1a(10) =1786785a(11) =232815a(12) =9945a(13) =170a(14) =1a(15) =144729585a(16) =20877615a(17) =1058250a(18) =24225a(19) =255a(20) =1a(21) =14038769745a(22) =2190735855a(23) =125644365a(24) =3480750a(25) =49980a(26) =357a(27) =1a(29) =263782657215a(30) =16639837830