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!)
A009436 Expansion of e.g.f. log(1+x)/exp(sin(x)). 3

%I #21 Sep 08 2023 04:04:01

%S 0,1,-3,8,-20,59,-261,1665,-12368,99945,-888961,8802045,-96423788,

%T 1154791637,-14982150197,209295667833,-3133083877248,50039962416625,

%U -849332973526881,15266142375582901,-289679348425382572

%N Expansion of e.g.f. log(1+x)/exp(sin(x)).

%H G. C. Greubel, <a href="/A009436/b009436.txt">Table of n, a(n) for n = 0..450</a>

%F a(n) ~ (n-1)! * (-1)^(n+1) * exp(sin(1)). - _Vaclav Kotesovec_, Jan 23 2015

%t With[{m=30}, CoefficientList[Series[Log[1+x]/E^Sin[x], {x,0,m}], x]*Range[0,m]!] (* _Vaclav Kotesovec_, Jan 23 2015 *)

%o (Magma)

%o R<x>:=PowerSeriesRing(Rationals(), 30);

%o [0] cat Coefficients(R!(Laplace( Log(1+x)*Exp(-Sin(x)) ))); // _G. C. Greubel_, Sep 08 2023

%o (SageMath)

%o def A009436_list(prec):

%o P.<x> = PowerSeriesRing(QQ, prec)

%o return P( log(1+x)*exp(-sin(x)) ).egf_to_ogf().list()

%o A009436_list(31) # _G. C. Greubel_, Sep 08 2023

%Y Cf. A009405 - A009420, A009422 - A009435, A009437 - A009439.

%K sign,easy

%O 0,3

%A _R. H. Hardin_

%E Extended with signs by _Olivier GĂ©rard_, Mar 15 1997

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 April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)