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A012828 arcsinh(sec(x)*arcsinh(x))=x+1/3!*x^3+13/5!*x^5-163/7!*x^7+12409/9!*x^9... 0

%I

%S 1,1,13,-163,12409,-931207,131515525,-22736601067,5414338951025,

%T -1621869733040399,608306871018022013,-276781704508170478131,

%U 150811097250449098751721,-96804685135198494755720343

%N arcsinh(sec(x)*arcsinh(x))=x+1/3!*x^3+13/5!*x^5-163/7!*x^7+12409/9!*x^9...

%K sign

%O 0,3

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

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Last modified August 12 13:34 EDT 2022. Contains 356077 sequences. (Running on oeis4.)