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!)
A010994 a(n) = binomial coefficient C(n,41). 5

%I #28 Dec 15 2023 11:03:15

%S 1,42,903,13244,148995,1370754,10737573,73629072,450978066,2505433700,

%T 12777711870,60403728840,266783135710,1108176102180,4353548972850,

%U 16253249498640,57902201338905,197548686920970,647520696018735,2044802197953900,6236646703759395

%N a(n) = binomial coefficient C(n,41).

%H T. D. Noe, <a href="/A010994/b010994.txt">Table of n, a(n) for n = 41..1000</a>

%H <a href="/index/Rec#order_42">Index entries for linear recurrences with constant coefficients</a>, signature (42, -861, 11480, -111930, 850668, -5245786, 26978328, -118030185, 445891810, -1471442973, 4280561376, -11058116888, 25518731280, -52860229080, 98672427616, -166509721602, 254661927156, -353697121050, 446775310800, -513791607420, 538257874440, -513791607420, 446775310800, -353697121050, 254661927156, -166509721602, 98672427616, -52860229080, 25518731280, -11058116888, 4280561376, -1471442973, 445891810, -118030185, 26978328, -5245786, 850668, -111930, 11480, -861, 42, -1).

%F G.f.: x^41/(1-x)^42. - _Zerinvary Lajos_, Dec 20 2008

%F From _Amiram Eldar_, Dec 15 2020: (Start)

%F Sum_{n>=41} 1/a(n) = 41/40.

%F Sum_{n>=41} (-1)^(n+1)/a(n) = A001787(41)*log(2) - A242091(41)/40! = 45079976738816*log(2) - 41737723319038472299669343741/1335732864265800 = 0.9772284535... (End)

%p seq(binomial(n,41),n=41..57); # _Zerinvary Lajos_, Dec 20 2008

%t Table[Binomial[n,41],{n,41,70}] (* _Vladimir Joseph Stephan Orlovsky_, May 16 2011 *)

%o (Magma) [Binomial(n, 41): n in [41..70]]; // _Vincenzo Librandi_, Jun 12 2013

%Y Cf. A010990, A010991, A010992, A001787, A242091.

%K nonn,easy

%O 41,2

%A _N. J. A. Sloane_

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 16:26 EDT 2024. Contains 372554 sequences. (Running on oeis4.)