Expansion of the g.f. (x^2-x+1)*(x^2-3*x+3)/(x-1)^6.

Terms

a(0) =3a(1) =12a(2) =34a(3) =80a(4) =166a(5) =314a(6) =553a(7) =920a(8) =1461a(9) =2232a(10) =3300a(11) =4744a(12) =6656a(13) =9142a(14) =12323a(15) =16336a(16) =21335a(17) =27492a(18) =34998a(19) =44064a(20) =54922a(21) =67826a(22) =83053a(23) =100904a(24) =121705a(25) =145808a(26) =173592a(27) =205464a(28) =241860a(29) =283246