This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A160087 #11 Sep 08 2022 08:45:44
%S A160087 1,2,-1454,-8740,6342316,63656312,-46108171016,-649081759408,
%T A160087 469281829870480,8509453301475872,-6140897264957486816,
%U A160087 -136349623665433187392,98215011088057307180224,2582003037826533660970880,-1856403314087385132972023936
%N A160087 Numerator of Hermite(n, 1/27).
%H A160087 G. C. Greubel, <a href="/A160087/b160087.txt">Table of n, a(n) for n = 0..376</a>
%F A160087 From _G. C. Greubel_, Sep 23 2018: (Start)
%F A160087 a(n) = 27^n * Hermite(n, 1/27).
%F A160087 E.g.f.: exp(2*x - 729*x^2).
%F A160087 a(n) = numerator(Sum_{k=0..floor(n/2)} (-1)^k*n!*(2/27)^(n-2*k)/(k!*(n-2*k)!)). (End)
%e A160087 Numerators of 1, 2/27, -1454/729, -8740/19683, 6342316/531441..
%t A160087 Table[27^n*HermiteH[n, 1/27], {n, 0, 30}] (* _G. C. Greubel_, Sep 23 2018 *)
%o A160087 (PARI) a(n)=numerator(polhermite(n, 1/27)) \\ _Charles R Greathouse IV_, Jan 29 2016
%o A160087 (PARI) x='x+O('x^30); Vec(serlaplace(exp(2*x - 729*x^2))) \\ _G. C. Greubel_, Sep 23 2018
%o A160087 (Magma) [Numerator((&+[(-1)^k*Factorial(n)*(2/27)^(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 A160087 Cf. A009971 (denominators).
%K A160087 sign,frac
%O A160087 0,2
%A A160087 _N. J. A. Sloane_, Nov 12 2009