1,3
sin(atanh(x)) = x + x^3/3! + 5x^5/5! + 5x^7/7! - 5815x^9/9! -...
Bisection of A002019.
Sequence in context: A055928 A051716 A102060 this_sequence A078473 A110800 A021645
Adjacent sequences: A102055 A102056 A102057 this_sequence A102059 A102060 A102061
sign
Ralf Stephan, Dec 28 2004
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