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

Terms

a(0) =1a(1) =5a(2) =15a(3) =34a(4) =62a(5) =90a(6) =91a(7) =11a(8) =-231a(9) =-716a(10) =-1444a(11) =-2172a(12) =-2171a(13) =17a(14) =6579a(15) =19702a(16) =39386a(17) =59070a(18) =59071a(19) =23a(20) =-177123a(21) =-531416a(22) =-1062856a(23) =-1594296a(24) =-1594295a(25) =29a(26) =4782999a(27) =14348938a(28) =28697846a(29) =43046754