Inverse of triangle related to Padé approximation of exp(x).

Terms

a(0) =1a(1) =-2a(2) =1a(3) =0a(4) =-6a(5) =1a(6) =0a(7) =12a(8) =-12a(9) =1a(10) =0a(11) =0a(12) =60a(13) =-20a(14) =1a(15) =0a(16) =0a(17) =-120a(18) =180a(19) =-30a(20) =1a(21) =0a(22) =0a(23) =0a(24) =-840a(25) =420a(26) =-42a(27) =1a(28) =0a(29) =0