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A012138 cos(arcsin(arctanh(x)))=1-1/2!*x^2-11/4!*x^4-349/6!*x^6-22455/8!*x^8... 1

%I

%S 1,-1,-11,-349,-22455,-2465241,-416217603,-100729124469,

%T -33198564667887,-14328891118054449,-7852649782447649403,

%U -5329635152693662625805,-4388960085492355649955495

%N cos(arcsin(arctanh(x)))=1-1/2!*x^2-11/4!*x^4-349/6!*x^6-22455/8!*x^8...

%Y Cf. A012251.

%K sign

%O 0,3

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

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Last modified September 22 20:23 EDT 2020. Contains 337291 sequences. (Running on oeis4.)