Triangle T(n,k) represents the coefficients of (x^9*d/dx)^n, where n=1,2,3,...;generalization of Stirling numbers of second kind A008277, Lah-numbers A008297.

A223511

Triangle T(n,k) represents the coefficients of (x^9*d/dx)^n, where n=1,2,3,...;generalization of Stirling numbers of second kind A008277, Lah-numbers A008297.

Terms

    a(0) =1a(1) =9a(2) =1a(3) =153a(4) =27a(5) =1a(6) =3825a(7) =855a(8) =54a(9) =1a(10) =126225a(11) =32895a(12) =2745a(13) =90a(14) =1a(15) =5175225a(16) =1507815a(17) =150930a(18) =6705a(19) =135a(20) =1a(21) =253586025a(22) =80565975a(23) =9205245a(24) =499590a(25) =13860a(26) =189a(27) =1a(28) =14454403425a(29) =4926412575

External references