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%I #8 Mar 23 2022 13:01:27
%S 0,-1,1,-31,421,-19531,873841,-67417351,6079224061,-745862759491,
%T 109749390119881,-20006355219508351,4313763491717212501,
%U -1101230418170874812731,326019382476444960095521,-111246859639685180908387831,43247270290320815515213664941
%N Expansion of e.g.f. tan(cos(x) - 1) (even part).
%o (PARI) my(N=40, x='x+O('x^N)); v=Vec(serlaplace(tan(cos(x)-1))); concat(0, vector(#v\2, k, v[2*k-1]))
%Y Cf. A000182, A003705, A192007, A192060.
%K sign
%O 0,4
%A _Seiichi Manyama_, Mar 23 2022