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

Terms

a(0) =-3a(1) =0a(2) =27a(3) =-18a(4) =-63a(5) =36a(6) =207a(7) =-126a(8) =-603a(9) =360a(10) =1827a(11) =-1098a(12) =-5463a(13) =3276a(14) =16407a(15) =-9846a(16) =-49203a(17) =29520a(18) =147627a(19) =-88578a(20) =-442863a(21) =265716a(22) =1328607a(23) =-797166a(24) =-3985803a(25) =2391480a(26) =11957427a(27) =-7174458a(28) =-35872263a(29) =21523356