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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A009690 Expansion of tan(tan(sin(x))). 0

%I #10 Jun 01 2021 12:42:08

%S 1,3,33,739,26913,1416995,101493889,9507242819,1129063338945,

%T 165774337045955,29468302949572705,6227421783562843427,

%U 1539946012373786340321,439696998663601508079587

%N Expansion of tan(tan(sin(x))).

%t With[{nn=30},Take[CoefficientList[Series[Tan[Tan[Sin[x]]],{x,0,nn}],x] Range[ 0,nn-1]!,{2,-1,2}]] (* _Harvey P. Dale_, Jun 01 2021 *)

%K nonn

%O 0,2

%A _R. H. Hardin_

%E Extended and signs tested Mar 15 1997 by _Olivier GĂ©rard_.

%E Prior Mathematica program replaced by _Harvey P. Dale_, Jun 01 2021

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 29 13:27 EST 2023. Contains 367445 sequences. (Running on oeis4.)