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%I #7 Mar 27 2021 18:30:16
%S 1,-1,-1,-359,-1681,-52981,-1887113,-27492467,-3259141,-1194145112779,
%T -55919619312049,-7462251938940527,-113201511292945547,
%U -1055956853774285077,-44032898634010565651,-75833822693358307239889
%N Numerator of [x^n] in the Taylor series arccosh(exp(x)-arctanh(x))= x-x^2/6-x^3/72 -359*x^4/2160 -1681*x^5/51840 -52981*x^6/435456 -...
%C The inner function exp(x)-arctanh(x) = 1+x^2/2! -x^3/3! +x^4/4! -23*x^5/120 + x^6/6! -719*x^7/7!.. has e.g.f. coefficients apparently closely related to A127230.
%K sign,frac
%O 1,4
%A Patrick Demichel (patrick.demichel(AT)hp.com)
%E Values replaced by numerators. - _R. J. Mathar_, Dec 22 2011
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