Triangle T(n,k): the coefficient of [t^n] [x^k] of 2^(n+5) *n! *exp(t*(1+t)*x) / (3+exp(t*(1+t))).

Terms

a(0) =8a(1) =-4a(2) =16a(3) =-20a(4) =48a(5) =32a(6) =-46a(7) =-216a(8) =336a(9) =64a(10) =-124a(11) =-1328a(12) =288a(13) =1408a(14) =128a(15) =1306a(16) =-4920a(17) =-15280a(18) =9920a(19) =4800a(20) =256a(21) =17726a(22) =792a(23) =-109200a(24) =-49600a(25) =72000a(26) =14592a(27) =512a(28) =164321a(29) =467572