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A159996 Numerator of Hermite(n, 17/24). 1

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

%S 1,17,1,-9775,-167039,8421137,383695489,-8028901423,-910021430015,

%T 3028224568337,2410255364260609,32253054435619793,

%U -7087387068572072831,-231952136295227242735,22591990867714977552769,1319294858293510861104593,-75169387957539018389183999

%N Numerator of Hermite(n, 17/24).

%H G. C. Greubel, <a href="/A159996/b159996.txt">Table of n, a(n) for n = 0..428</a>

%F From _G. C. Greubel_, Jul 16 2018: (Start)

%F a(n) = 12^n * Hermite(n, 17/24).

%F E.g.f.: exp(17*x - 144*x^2).

%F a(n) = numerator(Sum_{k=0..floor(n/2)} (-1)^k*n!*(17/12)^(n-2*k)/(k!*(n-2*k)!)). (End)

%e Numerators of 1, 17/12, 1/144, -9775/1728, -167039/20736, ...

%t Numerator[Table[HermiteH[n, 17/24], {n, 0, 30}]] (* or *) Table[12^n* HermiteH[n, 1/12], {n, 0, 30}] (* _G. C. Greubel_, Jul 16 2018 *)

%o (PARI) a(n)=numerator(polhermite(n, 17/24)) \\ _Charles R Greathouse IV_, Jan 29 2016

%o (PARI) x='x+O('x^30); Vec(serlaplace(exp(17*x - 144*x^2))) \\ _G. C. Greubel_, Jul 16 2018

%o (Magma) [Numerator((&+[(-1)^k*Factorial(n)*(17/12)^(n-2*k)/( Factorial(k) *Factorial(n-2*k)): k in [0..Floor(n/2)]])): n in [0..30]]; // _G. C. Greubel_, Jul 16 2018

%Y Cf. A001021 (denominators).

%K sign,frac

%O 0,2

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

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Last modified July 12 21:16 EDT 2024. Contains 374257 sequences. (Running on oeis4.)