%I #10 Jul 24 2023 04:45:20
%S 1,1,3,11,43,181,797,3623,16883,80211,387069,1891993,9348037,46611111,
%T 234246003,1185284981,6033612461,30877015405,158761428015,
%U 819773798543,4249143243487,22100975481441,115316005733921,603418314889419
%N Revert transform of 2*x*(1-x-x^3+x^4+x^6)-x/(1+x).
%C Sign diagram of generating sequence: +---++++-+-+-+-+-+-+...
%H <a href="/index/Res#revert">Index entries for reversions of series</a>
%p Order := 80:
%p g := 2*x*(1-x-x^3+x^4+x^6)-x/(1+x) ;
%p solve(series(g, x)=y, x) :
%p convert(%, polynom) :
%p seq(coeff(%, y, i), i=0..Order-1) ; # _R. J. Mathar_, Jul 24 2023
%o (PARI) a(n)=if(n<1,0,polcoeff(serreverse(x*(1-2*x^2*(1+x-x^3-x^4-x^5)+O(x^n))/(1+x)),n))
%K nonn
%O 1,3
%A _Olivier GĂ©rard_