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URL: https://oeis.org/A159514

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A159514
Numerator of Hermite(n, 2/15).
4
1, 4, -434, -5336, 564556, 11863024, -1222798904, -36921360416, 3704131105936, 147733421921344, -14410797291355424, -722443587811469696, 68443672240963470016, 4174970063145790238464, -383695602357053138639744, -27837093807246691056882176, 2478596940681121921590743296
OFFSET
0,2
LINKS
FORMULA
From G. C. Greubel, Jun 11 2018: (Start)
a(n) = 15^n * Hermite(n,2/15).
E.g.f.: exp(4*x-225*x^2).
a(n) = numerator(Sum_{k=0..floor(n/2)} (-1)^k*n!*(4/15)^(n-2*k)/(k!*(n-2*k)!)). (End)
MATHEMATICA
Numerator[Table[HermiteH[n, 2/15], {n, 0, 50}]] (* Vladimir Joseph Stephan Orlovsky, Apr 28 2011 *)
PROG
(PARI) a(n)=numerator(polhermite(n, 2/15)) \\ Charles R Greathouse IV, Jan 29 2016
(Magma) [Numerator((&+[(-1)^k*Factorial(n)*(4/15)^(n-2*k)/( Factorial(k) *Factorial(n-2*k)): k in [0..Floor(n/2)]])): n in [0..30]]; // G. C. Greubel, Jun 11 2018
CROSSREFS
Cf. A159513.
Sequence in context: A172858 A125760 A053780 * A217269 A034985 A262102
KEYWORD
sign,frac
AUTHOR
N. J. A. Sloane, Nov 12 2009
STATUS
approved