Triangular sequence of coefficients of p(x,t) = t*exp(3*x*t - t^2)/(exp(t) - 1).

Terms

a(0) =2a(1) =-3a(2) =18a(3) =-44a(4) =-72a(5) =216a(6) =360a(7) =-1980a(8) =-1620a(9) =3240a(10) =7176a(11) =25920a(12) =-71280a(13) =-38880a(14) =58320a(15) =-151200a(16) =753480a(17) =1360800a(18) =-2494800a(19) =-1020600a(20) =1224720a(21) =-3587520a(22) =-21772800a(23) =54250560a(24) =65318400a(25) =-89812800a(26) =-29393280a(27) =29393280a(28) =152409600a(29) =-678041280