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 A159281 Numerator of Hermite(n, 2/11). 1
 1, 4, -226, -2840, 152716, 3359984, -171346424, -5564082464, 268004512400, 11844081699904, -536337501207584, -30808027718598016, 1304498317340196544, 94684505764169424640, -3725213683295580628864, -335691960262188333195776, 12179757829314204349993216 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Denominator is 11^n. - Robert Israel, May 21 2014 LINKS G. C. Greubel, Table of n, a(n) for n = 0..434 (terms 0..82 from Robert Israel) FORMULA a(n) = 4*a(n-1) - 242*(n-1)*a(n-2) for n >= 2. E.g.f.: exp(-11*x^2 + 4*x). - Robert Israel, May 21 2014 From G. C. Greubel, Jun 27 2018: (Start) a(n) = 11^n * Hermite(n, 2/11). a(n) = numerator(Sum_{k=0..floor(n/2)} (-1)^k*n!*(4/11)^(n-2*k)/(k!*(n-2*k)!)). (End) MAPLE N:= 30; # to get a(n) for n <= N A159281[0]:= 1: A159281[1]:= 4: for n from 2 to N do A159281[n]:= 4*A159281[n-1] - 242*(n-1)*A159281[n-2] od: seq(A159281[n], n=0..N); # Robert Israel, May 21 2014 MATHEMATICA Numerator[Table[HermiteH[n, 2/11], {n, 0, 50}]] (* Vladimir Joseph Stephan Orlovsky, Apr 12 2011 *) PROG (PARI) a(n)=numerator(polhermite(n, 2/11)) \\ Charles R Greathouse IV, Jan 29 2016 (Magma) [Numerator((&+[(-1)^k*Factorial(n)*(4/11)^(n-2*k)/( Factorial(k) *Factorial(n-2*k)): k in [0..Floor(n/2)]])): n in [0..30]]; // G. C. Greubel, Jun 27 2018 CROSSREFS Cf. A159280. Sequence in context: A211610 A042539 A182484 * A290346 A113255 A145767 Adjacent sequences: A159278 A159279 A159280 * A159282 A159283 A159284 KEYWORD sign,frac AUTHOR N. J. A. Sloane, Nov 12 2009 STATUS approved

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Last modified December 8 07:38 EST 2022. Contains 358691 sequences. (Running on oeis4.)