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A012868 Numerators of coefficients in Taylor series expansion of log(cotan(x)*arcsinh(x)). 1

%I

%S 0,-1,-1,-1,347,-1531,590267,-37723537,1103996977,-2158074791,

%T 328785573754709,-134852375996381,3427455470023873621,

%U -13844935285148389217,6142449451071240707,-43761094586606903148089,37938502177281712935274975819,-110450564689571423030247983611,4389621268440117526955711378765711

%N Numerators of coefficients in Taylor series expansion of log(cotan(x)*arcsinh(x)).

%e -1/2*x^2-1/60*x^4-1/18*x^6+347/22680*x^8-1531/85050*x^10+590267/52123500*x^12+...

%Y Cf. A202622.

%K sign,frac

%O 0,5

%A Patrick Demichel (patrick.demichel(AT)hp.com)

%E Corrected by _N. J. A. Sloane_, Dec 21 2011

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Last modified January 25 21:23 EST 2021. Contains 340427 sequences. (Running on oeis4.)