%I #5 Apr 21 2020 19:07:17
%S 1,1,1,3,-3,11,-47,291,-361,-327,2651,8117,-23761,-920509,3401813,
%T 48080231,-949833905,-533061737,47194458351,9309105461,-5717668358773,
%U 5794759242411,416358013987311,-3775846647202969,-144292064358491357,269618719159718919,14658236743430975341
%N Numerators of power series coefficients of A(x) satisfying A(A(x)) = x + Sum_{k>=2} prime(k-1) * x^k.
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Functional_square_root">Functional square root</a>
%e 1, 1, 1/2, 3/4, -3/8, 11/8, -47/16, 291/64, -361/128, -327/64, 2651/256, 8117/512, -23761/1024, -920509/2048, ...
%Y Cf. A008578, A030274, A030278, A334284 (denominators).
%K sign,frac
%O 1,4
%A _Ilya Gutkovskiy_, Apr 21 2020
|