Revert transform of 2*x*(1 - x + x^2 - x^3 + x^4 - x^5)-x/(1+x).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =17a(8) =73a(9) =241a(10) =661a(11) =1585a(12) =3461a(13) =7285a(14) =16231a(15) =41921a(16) =124577a(17) =389233a(18) =1186617a(19) =3423201a(20) =9327801a(21) =24355849a(22) =62489483a(23) =162336209a(24) =437155705a(25) =1226390417a(26) =3534342301a(27) =10244919841a(28) =29383388701a(29) =82792942045