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!)
A160075 Numerator of Hermite(n, 15/26). 1

%I #13 Sep 08 2022 08:45:44

%S 1,15,-113,-11835,-62943,15056775,332225295,-25551760275,

%T -1169321452095,51552138002175,4330357927305615,-109290857537767275,

%U -17739633636788785695,177189213621352281975,80605788404370208573455,370627467209314130296125,-403111935202017245512974975

%N Numerator of Hermite(n, 15/26).

%H G. C. Greubel, <a href="/A160075/b160075.txt">Table of n, a(n) for n = 0..422</a>

%F From _G. C. Greubel_, Sep 23 2018: (Start)

%F a(n) = 13^n * Hermite(n, 15/26).

%F E.g.f.: exp(15*x - 169*x^2).

%F a(n) = numerator(Sum_{k=0..floor(n/2)} (-1)^k*n!*(15/13)^(n-2*k)/(k!*(n-2*k)!)). (End)

%e Numerators of 1, 15/13, -113/169, -11835/2197, -62943/28561

%t Numerator[HermiteH[Range[0,20],15/26]] (* _Harvey P. Dale_, Mar 13 2018 *)

%t Table[13^n*HermiteH[n, 15/26], {n, 0, 30}] (* _G. C. Greubel_, Sep 23 2018 *)

%o (PARI) a(n)=numerator(polhermite(n, 15/26)) \\ _Charles R Greathouse IV_, Jan 29 2016

%o (PARI) x='x+O('x^30); Vec(serlaplace(exp(15*x - 169*x^2))) \\ _G. C. Greubel_, Sep 23 2018

%o (Magma) [Numerator((&+[(-1)^k*Factorial(n)*(15/13)^(n-2*k)/( Factorial(k) *Factorial(n-2*k)): k in [0..Floor(n/2)]])): n in [0..30]]; // _G. C. Greubel_, Sep 23 2018

%Y Cf. A001022 (denominators)

%K sign,frac

%O 0,2

%A _N. J. A. Sloane_, Nov 12 2009

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 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)