Triangle T(n,k) represents the coefficients of (x^11*d/dx)^n, where n=1,2,3,...

Terms

a(0) =1a(1) =11a(2) =1a(3) =231a(4) =33a(5) =1a(6) =7161a(7) =1287a(8) =66a(9) =1a(10) =293601a(11) =61215a(12) =4125a(13) =110a(14) =1a(15) =14973651a(16) =3476781a(17) =279840a(18) =10065a(19) =165a(20) =1a(21) =913392711a(22) =230534073a(23) =21106701a(24) =924000a(25) =20790a(26) =231a(27) =1a(28) =64850882481a(29) =17511845967