Triangle T(n,k) represents the coefficients of (x^19*d/dx)^n, where n=1,2,3,...

Terms

a(0) =1a(1) =19a(2) =1a(3) =703a(4) =57a(5) =1a(6) =38665a(7) =3895a(8) =114a(9) =1a(10) =2822545a(11) =326895a(12) =12445a(13) =190a(14) =1a(15) =256851595a(16) =32896885a(17) =1484280a(18) =30305a(19) =285a(20) =1a(21) =27996823855a(22) =3875508945a(23) =197651965a(24) =4878440a(25) =62510a(26) =399a(27) =1a(29) =524061968815a(30) =29372612430