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%I #16 Sep 26 2023 12:39:42
%S 0,1,1,2,4,9,21,52,135,368,1045,3068,9230,28245,87414,272544,854012,
%T 2685897,8473107,26805994,85045674,270599945,863529480,2763745020,
%U 8870777955,28550721966,92128996782,298004209496,966085311052
%N Reversion of y - y^2 + y^4 - y^5.
%H <a href="/index/Res#revert">Index entries for reversions of series</a>
%F a(n+1) = (1/(n+1)) * Sum_{k=0..floor(n/3)} (-1)^k * binomial(n+k,n) * binomial(2*n-3*k,n). - _Seiichi Manyama_, Sep 26 2023
%t CoefficientList[InverseSeries[Series[y - y^2 + y^4 - y^5, {y, 0, 30}], x], x]
%Y Cf. A063019.
%K nonn,easy
%O 0,4
%A _Olivier Gérard_, Jul 05 2001
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