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!)
A027939 a(n) = T(2*n, n+3), T given by A027935. 1

%I #15 Sep 08 2022 08:44:49

%S 1,29,247,1300,5270,18228,56967,166681,467301,1274856,3419252,9076280,

%T 23945893,62955061,165188091,432974764,1134224458,2970340412,

%U 7777628427,20363608737,53314542953,139581703056,365432651464,956718812272,2504726904937,6557465674125

%N a(n) = T(2*n, n+3), T given by A027935.

%H G. C. Greubel, <a href="/A027939/b027939.txt">Table of n, a(n) for n = 3..1000</a>

%H <a href="/index/Rec#order_08">Index entries for linear recurrences with constant coefficients</a>, signature (9,-34,71,-90,71,-34,9,-1).

%F G.f.: x^3*(1+20*x+20*x^2-8*x^3-x^4) / ((1-x)^6*(1-3*x+x^2)). - _Colin Barker_, Feb 20 2016

%F a(n) = Fibonacci(2*n+7) - (195 + 186*n + 90*n^2 + 35*n^3 + 4*n^5)/15. - _G. C. Greubel_, Sep 28 2019

%p with(combinat); seq(fibonacci(2*n+7) - (195 +186*n +90*n^2 +35*n^3 +4*n^5)/15, n=3..30); # _G. C. Greubel_, Sep 28 2019

%t Table[Fibonacci[2*n+7] -(195 +186*n +90*n^2 +35*n^3 +4*n^5)/15, {n,3,30}] (* _G. C. Greubel_, Sep 28 2019 *)

%o (PARI) vector(30, n, my(m=n+2); fibonacci(2*m+7) - (195 +186*m +90*m^2 +35*m^3 +4*m^5)/15) \\ _G. C. Greubel_, Sep 28 2019

%o (Magma) [Fibonacci(2*n+7) - (195 +186*n +90*n^2 +35*n^3 +4*n^5)/15: n in [3..30]]; // _G. C. Greubel_, Sep 28 2019

%o (Sage) [fibonacci(2*n+7) - (195 +186*n +90*n^2 +35*n^3 +4*n^5)/15 for n in (3..30)] # _G. C. Greubel_, Sep 28 2019

%o (GAP) List([3..30], n-> Fibonacci(2*n+7) - (195 +186*n +90*n^2 +35*n^3 +4*n^5)/15 ); # _G. C. Greubel_, Sep 28 2019

%Y Cf. A000045, A027935.

%K nonn

%O 3,2

%A _Clark Kimberling_

%E Terms a(23) onward added by _G. C. Greubel_, Sep 28 2019

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 26 05:37 EDT 2024. Contains 372807 sequences. (Running on oeis4.)