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A012790 tanh(sec(x)*arcsin(x))=x+2/3!*x^3-20/5!*x^5-1104/7!*x^7-23728/9!*x^9... 0

%I

%S 1,2,-20,-1104,-23728,2048224,394518592,28921612032,-3968669081344,

%T -2038929577444864,-347998546570798080,59058720637105172480,

%U 67936182152875665510400,22515279368057454566531072

%N tanh(sec(x)*arcsin(x))=x+2/3!*x^3-20/5!*x^5-1104/7!*x^7-23728/9!*x^9...

%K sign

%O 0,2

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

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Last modified July 2 18:27 EDT 2022. Contains 355029 sequences. (Running on oeis4.)