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A159247 Numerator of Hermite(n, 1/10). 4

%I #17 Sep 08 2022 08:45:43

%S 1,1,-49,-149,7201,37001,-1763249,-12863549,604273601,5749693201,

%T -266173427249,-3141020027749,143254364959201,2027866381608601,

%U -91087470841872049,-1510593937967892749,66805009193436144001,1275280159567750343201

%N Numerator of Hermite(n, 1/10).

%H G. C. Greubel, <a href="/A159247/b159247.txt">Table of n, a(n) for n = 0..450</a> (terms 0..100 from T. D. Noe)

%F From _G. C. Greubel_, Jun 10 2018: (Start)

%F a(n) = 5^n * Hermite(n,1/10).

%F E.g.f.: exp(x-25*x^2).

%F a(n) = numerator(Sum_{k=0..floor(n/2)} (-1)^k*n!*(1/5)^(n-2*k)/(k!*(n-2*k)!)). (End)

%t Numerator[Table[HermiteH[n,1/10],{n,0,50}]] (* _Vladimir Joseph Stephan Orlovsky_, Apr 02 2011*)

%o (PARI) a(n)=numerator(polhermite(n,1/10)) \\ _Charles R Greathouse IV_, Jan 29 2016

%o (Magma) [Numerator((&+[(-1)^k*Factorial(n)*(1/5)^(n-2*k)/( Factorial(k) *Factorial(n-2*k)): k in [0..Floor(n/2)]])): n in [0..30]]; // _G. C. Greubel_, Jun 10 2018

%Y Cf. A158811, A158954, A158960.

%K sign,frac

%O 0,3

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

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Last modified April 23 23:26 EDT 2024. Contains 371917 sequences. (Running on oeis4.)