Expansion of 1/((1+x)*(1+2*x)*(1-3*x)).

Terms

a(0) =1a(1) =0a(2) =7a(3) =6a(4) =49a(5) =84a(6) =379a(7) =882a(8) =3157a(9) =8448a(10) =27391a(11) =78078a(12) =242425a(13) =710892a(14) =2165443a(15) =6430794a(16) =19423453a(17) =58008216a(18) =174548935a(19) =522598230a(20) =1569891841a(21) =4705481220a(22) =14124832267a(23) =42357719586a(24) =127106713189a(25) =381253030704