The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 60th year, we have over 367,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A012255 Expansion of e.g.f.: exp(tanh(arcsin(x)))=1+x+1/2!*x^2-3/4!*x^4-4/5!*x^5+21/6!*x^6... 0
 1, 1, 1, 0, -3, -4, 21, 136, 185, 272, 9641, 222016, 1668021, 21267520, 192801597, 3836913536, 42064398961, 874251520256, 10576096455505, 254117293340672, 3476312353756781, 92635637659667456 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 LINKS Table of n, a(n) for n=0..21. MATHEMATICA With[{nn=30}, CoefficientList[Series[Exp[Tanh[ArcSin[x]]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Sep 30 2019 *) CROSSREFS Sequence in context: A081698 A182096 A012123 * A012247 A057791 A167452 Adjacent sequences: A012252 A012253 A012254 * A012256 A012257 A012258 KEYWORD sign AUTHOR Patrick Demichel (patrick.demichel(AT)hp.com) EXTENSIONS Definition clarified by Harvey P. Dale, Sep 30 2019 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 6 03:07 EST 2023. Contains 367594 sequences. (Running on oeis4.)