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%I #19 Sep 08 2022 08:45:44
%S 1,38,-14,-111340,-4169684,490886888,49050698104,-2430351968272,
%T -592964799643760,5814962971461728,8001852693840964384,
%U 219288242242044652352,-120000760298623690001216,-8396695977614513457596800,1955419963550761908894369664
%N Numerator of Hermite(n, 19/27).
%H G. C. Greubel, <a href="/A160147/b160147.txt">Table of n, a(n) for n = 0..376</a>
%F From _G. C. Greubel_, Sep 24 2018: (Start)
%F a(n) = 27^n * Hermite(n, 19/27).
%F E.g.f.: exp(38*x - 729*x^2).
%F a(n) = numerator(Sum_{k=0..floor(n/2)} (-1)^k*n!*(38/27)^(n-2*k)/(k!*(n-2*k)!)). (End)
%e Numerators of 1, 38/27, -14/729, -111340/19683, -4169684/531441, ...
%t Table[27^n*HermiteH[n, 19/27], {n, 0, 30}] (* _G. C. Greubel_, Sep 24 2018 *)
%o (PARI) a(n)=numerator(polhermite(n, 19/27)) \\ _Charles R Greathouse IV_, Jan 29 2016
%o (PARI) x='x+O('x^30); Vec(serlaplace(exp(38*x - 729*x^2))) \\ _G. C. Greubel_, Sep 24 2018
%o (Magma) [Numerator((&+[(-1)^k*Factorial(n)*(38/27)^(n-2*k)/( Factorial(k) *Factorial(n-2*k)): k in [0..Floor(n/2)]])): n in [0..30]]; // _G. C. Greubel_, Sep 24 2018
%Y Cf. A009971 (denominators).
%K sign,frac
%O 0,2
%A _N. J. A. Sloane_, Nov 12 2009
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