The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A082029 Expansion of exp(2*x)*(1+x)/(1-x)^2. 1

%I #15 Mar 10 2023 07:13:43

%S 1,5,26,146,904,6232,47920,409712,3873152,40220288,455828224,

%T 5604002560,74326764544,1058271540224,16104132110336,260886940141568,

%U 4483390378639360,81474025156476928,1561147449772146688

%N Expansion of exp(2*x)*(1+x)/(1-x)^2.

%C Binomial transform of A082028.

%F E.g.f.: exp(2*x)*(1+x)/(1-x)^2.

%F D-finite with recurrence -(2*n+3)*a(n) + (2*n^2+9*n+14)*a(n-1) - 2*(2*n+5)*(n-1)*a(n-2) = 0. - _R. J. Mathar_, Nov 12 2012

%F a(n) ~ n! * 2*exp(2)*n. - _Vaclav Kotesovec_, Jul 02 2015

%t CoefficientList[Series[E^(2*x)*(1+x)/(1-x)^2, {x, 0, 20}], x] * Range[0, 20]! (* _Vaclav Kotesovec_, Jul 02 2015 *)

%K easy,nonn

%O 0,2

%A _Paul Barry_, Apr 01 2003

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 May 16 05:56 EDT 2024. Contains 372549 sequences. (Running on oeis4.)